I spent my entire career in construction and dragging the tools out of their storage areas, boxes or trucks, setting up shop and going to work every day, then cleaning up and putting things away at days end is pretty much the normal routine and not a big deal. I would certainly do projects in the garage like this any day, before I would lug all that stuff upstairs, have to use partial pieces due to space constraints, etc. Find some better ways to store things, such as some good racking, cabinets, etc. that don't get in the way of parking.
I agree if it were my career setup and pack up on a daily basis would not be an issue. As you said a garage shop is different. I generally get 2-3 hours after work to do projects; it is why out kitchen remodel (down to me building the cabinets from sheet goods) took as long as it did.
Many of my tools are not the lugging kind (band saw, hybrid table saw, jointer, floor mount drill press and the like). Right now plywood, or other sheets goods is processed to rough size with a guide and a worm drive saw before being taken upstairs for final work.
The garage has been optimized a few times. My lumber rack is down stairs and my old kitchen cabinets are upstairs. But, coupled with the other demands of the garage (bikes and kayaks from the room, lawn mower and snow thrower storage, the recycling sorting, wall of rakes and shovels, wall of cabinets, and two sets of winter or summer tires, and the random bits and pieces of other stuff that I or the DW deems as a garage item are on the first floor of the garage. Leaving my current shop in the loft.
Given the footprint of our garage, I was/am hoping to be able to use the space below the garage door tracks/openers as additional storage.
My attic shop is at the point where adding "stationary tools" would become space constrained.
The vehicle lift doesn't sound like a good idea for anything other than lifting vehicles. The posts and drive on runners will be in the way when doing projects.
I agree the posts could get in the way. Though not as much as the 90 degree landing on the current stairs to the shop.
Why isn't moving tools at the end of the day not an option? I do a lot of woodworking and my jointer, bandsaw, tablesaw, and workbench are all on castors and can easily be moved to the side at the end of the day for both my vehicles to park in the garage. In fact, after I finish my remodeling project I am working on currently, my plan is to put the rest of my stuff on mobile carts with heavy duty casters even though my long term plan is to build a dedicated shop in the future. They way I'm thinking, I can rearrange my heavy woodworking tools easily even when I'm in the new shop.
It is simply too many things in too little space. I gave a truncated list in response to Fishindude of what is on the first floor now. Some of it could move to the second floor if my entire shop moved down stairs.
Even with all my tools on casters/mobile bases; there simply is not enough square feet to move them to the side and be able to get our two cars into the garage and enter the house through the connected mud room.
Time is another factor. Most days that I work in the shop, it is 2-3 hours after work and before dinner.
The problem I have with trying to utilize open space above your vehicles for a woodworking area is simply the vertical space. With 11 feet ceilings and probably a foot of that used up for some sort of platform, that leaves you with 10 feet of usable vertical space. 6 to 7 feet of that would be minimum for a lot of vehicles so that leaves you with 4 to 5 feet above. Not much of a work space if you have to crouch. I have 10 feet ceilings in my garage and I use every bit of that at times working with wood. For areas where I don't need the height such as above my cars, I use that space to hang things like bicycles and ladders to free up more floor space for my woodworking tools and other things not conducive to suspending over a vehicle.
Rereading my original post, I can see how you could interpret my question as building a floor 1.5 into the garage. What I was envisioning, in my day dream here, was a platform that a series of tools that only need 4 to 5 feet of vertical clearance, by themselves, could be placed on while the platform the level of the garage slab and then lifted to allow for a car to park underneath; my though was not to try and use the raised platform as a work area, but as a kind of hide-a-workshop.
Whether I would use the new area to relocate up space in my existing wood working shop, or house new tools that do not need to be with the band/table/miter saws, jointer, planer, drill press, air compressor, dust collector, ect).
One day I would love to have the free time to learn to weld or take up 3d printing/cnc/laser work, but any growth in stationary tools at this point will make my shop, as it is, a little too cramped.
I had a workshop (not garage/workshop) at my old house. I put in some racks that are mounted on the ceiling and can be raised or lowered. They enable me to store things on them and get them out of my way when I don't need them. They were about 4x6 feet in size and were a few hundred dollars. I wouldn't try to put a band saw or table saw on them, and certainly wouldn't stand on them, but for storing lots of things off the floor they were great.
That might be a good idea to free up a little space in the existing cabinets or to reclaim the floor space that is used by a couple shelving units.