A good friend of mine, and fellow angel breeder, is retired on disability. He has a serious inner ear problem, he can't bend down, or even tilt his head too far without severe vertigo. If he tilts his head sideways even a little, as someone might looking around a corner, he totally loses balance.
He has somewhere near 30 tanks running, and having the time for maintenance most often puts the quality of my angels to shame. His setup is near the opposite design of mine, which is really vertically oriented, taking up very few square feet of floor space. His is spread out, all the tanks, brine shrimp hatchery, everything, at the same level. If he is running his setup with his disability, there is no reason you couldn't do the same, just with stands at a lower level.
The python is an excellent idea, if moving full buckets is a problem a small pond pump attached to a hose will move water from bucket to tank, tank to bucket, bucket to sink, wherever you need. I do something similar now with a large garbage can, small sump pump, long hose to drain & another hose to fill.
I have various siphon tubing & pvc gadgets to make water changes easier, I could post pics if you like. I completely stole this idea from my disabled aquarist buddy, I have to give credit where credit is due.
I'm in the process of drilling tanks right now, an option to the self siphoning overflows in that link. I should have them running to a sump soon, hopefully in a week. This eliminates the draining, just fill with a hose. This might be another option.
There are many many options for folks like you, as well as Sarah, that have been used by other aquarists with disabilities, or can be modified a bit from existing ideas that folks with many tanks use. At 48 I'm one of the younger breeders in the club, there are plenty of guys who are up in their years who have to modify their setup, maintenance tools, or routine to accommodate the effects of age. I see this, realize it, and am trying to get a jump on it.
You just have to get your gear set up in a way that works best for you. Everyone with a larger setup generally works that way. I would find it a pain working my buddy's setup, too spread out for multi tasking. He obviously couldn't work my setup. Someone who weighs 300 pounds would have a hard time with my fishroom, as would someone who is 5'4".
Everyone has strengths & weaknesses, design your setup around these, and you will be just as proficient an aquarist as the next guy. I'm busy upgrading my setup, and perhaps chasing my tail, trying to catch up to a breeder who is better than me, but considered disabled.
Do not hesitate to contact me with any questions, there is no reason you can't have as nice a setup, or as enjoyable a time with aquatics than anyone else.