I'm disabled (although my husband is able) and we are both passionate gardeners.  Sure, there's some stuff I can't do from my powerchair, I can't reach up to cut back overgrown hedges/take cuttings or get right down to the ground (unless my husband lifts me onto the floor, which being so tiny, he can actually do!) but we created a patio "tub" garden with all the pots high enough for me to work on as well as making raised beds for growing veg (they do better in those than our clay soil anyway.) I had so many fatties stop to admire it and ask for help. They'll literally say "Oh well I can't manage x, y or z but I want a pretty garden. Your husband could do it for me!" Um no. Not unless you're going to pay him and trust me, you won't like his prices! They get all sulky about it while I smile sweetly, internally laughing and thinking "If you can't put effort into losing weight there's no way on earth you'd put the effort in to maintain a garden like mine!" Like you though, my husband is happy to help elderly or disabled people to achieve their dream garden but refuses to do it for people whose lack of ability is entirely self inflicted. We've just moved actually and have an almost blank slate of a garden. It's mostly lawn with a couple of flowering shrubs. It's so much fun planning out what we're going to do with it. I brought along all of my potted garden to get us started (as well as cutting back and digging up our buddleias, honeysuckle and clematis so we can quickly start to cover the ugly fence at the back). I can't wait to create a colourful oasis! I've just invested in a couple of bokashi composters (for food waste indoors) and a large composter bin for outdoor waste. We've finally got enough space for a greenhouse too. I'm ecstatic!!