Congrats on the upcoming baby #2!
Your family does not sound unlike ours about 8 years ago - 2 adults, 1 kid, 3 bed 1 bath, unfinished basement, standard yard, winter a good portion of the year and lots of gear - we tent camp/backpack, ski/snowboard/nordic ski, have 2 (pedal) bikes each - you get the idea! Over those 8 years, we added another child, a garage, finished the basement (with a second bathroom) and FINALLY figured out the storage for our bikes & yard stuff!
A garage was the first thing we added - but as my DH is a mechanic and likes to work on his (old) Jeep, classic cars and motorcycles, this did not help with house storage items AT ALL but was awesome for his hobbies. No cars that run are allowed in there either, so we still scrape windows!
Kid #2 came along and spent the bulk of the first year in our bedroom with us, and then the kids shared a 9'x11' room for the next 5-6 years (Ikea kids beds followed by a bunk bed.) This left us with the 3rd bedroom as the guest/office/"put a kid in there if one was having a terrible night" room. Only when the kids reached 9/7 did we start looking at finishing the basement in order to get everyone a bit more space. We did this just before the pandemic (thank goodness) and now have another guest/multi-use room (queen-sized cabinet bed gives it more flexibility) a second bathroom, and a second living room space. I think all of that was to say, do not think that you have to do all of this *RIGHT NOW* just because kid #2 is on the way. If they turn out to be another terrible sleeper you may have to pivot, but feeling the pressure to do everything right at this moment because they *might* be as poor a sleeper as #1 is putting undue pressure on you.
With regards to bikes/tools, this product is the best thing I have ever purchased when it comes to bike storage:
https://can.steadyrack.com/ (Sorry, it keeps taking me directly to the Canadian site but you can find it from there I am sure.) It hangs your bikes off a wall and allows them to be close together and "file" them out of the way. Game-changing. Then, we took some leftover 2x4' chunks and hung them on the outside of our garage at three different levels. Then grabbed a few screw-in type tool hangers from the hardware store
https://www.homedepot.ca/product/everbilt-7-16-x-5-in-heavy-duty-screw-in-large-tool-hanger-40lb/1000826782 and put all the rakes, shovels, axes, lawn edging tools etc hanging from those. The boards are directly one over the other with the hangers staggered, so the whole works only takes up about 4' of wall space. I can try to snap a photo if you are interested but I am not making sense! Maybe something like these would help even in your current sheds so that the pressure to get a garage up asap would be lessened - and you can always use them in/on it whenever it does get built?
Finally, for most of the household storage stuff, we purchased a bunch of bigger clear tubs with lids that stack nicely. I did put labels on them but you can also easily see the contents. Holiday decor, seasonal gear, extra parts/pieces of things all live in these. They are easy to move around and most of them live in a neat and tidy stack (2 wide, 4 tall) next to our deep freeze in the basement. I was going to build shelving for them to live on but then realized that was a waste of money and effort since they are not really visible to any of the living spaces anyhow and we do not need access to them often enough to justify it.
Sorry for the wall of text - but hopefully there is *something* in there that might help!
TTM