Hi and welcome back to the forum
Yes there are companies that clean aquariums but also private individuals that go to your house and clean tanks. Most pet shops have a staff member that cleans tanks. Otherwise Google for aquarium cleaning services in your area.
If you have lots of live plants in the tank and not too many fish, the plants will help keep the water cleaner for longer so you don't need to do water changes as often.
A few bits of limestone, shells, or dead coral rubble can help stop or slow the pH from dropping to quickly.
You could set up a syphon hose/ pipe that goes out the door or to a drain and gravel clean water straight out the door. Then have a couple of buckets to hold water in the house. Use a garden hose to fill the buckets and a water pump and hose to pump that water into the tank.
Some people set up automatic water change systems. My local pet shop had one. They had the tanks connected to a sump that contained a float like the one you have in a toilet cistern. Each day they turned the pumps off and water tap going to the sump off as well. They opened a tap in the sump and let it drain out. When it was empty, they closed the tap and turned the water back on. The sump filled up and then the water pump was turned back on. Other people do similar set ups but on a smaller scale.
Another shop had a big sump with a water pump that pumped water into all the tanks. The excess water flowed back into the sump. Each week they turned the tap on the pump so the water got pumped outside. The pump had a float on it and when the sump was virtually empty, the pump turned itself off. Then they filled the sump up, added dechlorinator, aerated it for 30 minutes before turning the pump on and putting water back into the tanks.
This all depends on how much you can do.
---------------------
I am concerned about the fact you have rheumatoid arthritis at such a young age and it has made you wheelchair bound to some degree. Have the doctors put you on anti-inflammatories or anything to help reduce the pain and discomfort?
Have you looked into natural supplements to help with arthritis?
Green lip mussels are meant to help and most health food shops sell a supplement made from them to help with arthritis.
Fish oil and flax oil also helps. Flax oil is better for you because it has Omega 3,6 & 9 fatty acids, whereas fish oil only has Omega 3. Flax oil doesn't make you burp fish flavoured burps afterwards.
Garlic oil can also help. These oils are natural products that all help reduce inflammation. Have a chat to your doctor and see if they are safe to take with any current medications you are on.
Probiotics might help and changing your diet might help.
If you can find out what is triggering the inflammation, you might be able to remove that item and lessen the side effects coming from your body.