I am going to echo what has already been said, switch to kegs; I bottled once, the people I started brewing with had just started with kegs and when I saw the 15 minutes needs to rinse the kegs with sanitizer and then simply place the hose in the keg and let the beer flow . . . well it sure beat the starting and stopping, capping, and spilling of bottling. I just got all 4 taps up and running.
A second tip I would give you is if you get into kegs, have more kegs. I was "forced" to brew more often when I only had 1-2 kegs online (plus the downtime is a annoying as you wait for carbonation), but with 4 kegs it stretches out the time between pulses of brewing. It also allows me to have my beer, a beer for the wife, and a couple general beers on tap. Heck if you can get 4 kegs filled and 4 beers in fermenters it will be some time before you have to brew again.
A third idea, if your setup allow and you have a beer you like, up your batch size, it will take longer to heat up and it will lengthen the day, but a 10 or 15 gallon batch instead of a 5 gallon batch will increase time between brews.
Fourth, equipment, equipment, equipment, I started off brewing using a cheap turkey fryer that I had inherited, I moved to a blichmann 72,000 BTU burner, and then one cold (-25f) brew day I vowed to go all electric and inside. I now have a dedicated brewery in the basement with exhaust hood and a brew kettle with a 5500 watt immersion element (exhaust hood pretty much required).
A little tip, with practice comes the ability to do other things. I will set a timer on my cell phone and go off and read a book, watch a TV show, drink a beer, play a game of pool, or attack another project, checking back occasionally, and acting when needed to add hops, transfer vessel, fight the break.
Finally, it sounds like you are doing this, but I will clean/prep in the days leading up to the brew and I will leave clean up until the following day, allowing the grains to cool allows for a a better experience as I wrestle them into the composter.