I am looking for inexpensive ways to solve a problem. My parents are not able to visit my home.

I can think of only one answer - take pictures of your home and then go and visit them. I too am disabled and cannot use a low toilet - impossible to get up again and I've had disasters trying - impossible. And I must have railings to hold on to so I check before I go any place. I don't know of any answers. Can someone stay with your mother while your father visits?

Check with the local hospital if they have something they can loan you for the toilet seat and a possible ramp - often at no charge. Check it out. Good luck.

It can be a lot to change around just for a visit but, mom would be able to visit more if your able to make changes. I had no idea how much I would have to do when my mom came to visit. She ended up staying with me! I would say, visit them first and see how mom gets around. That would give you a clear idea of what you’ll have to do and what changes you’ll have to make. Area rugs would have to be removed for one. They’re a fall hazard. Flat non-slip bath mats are best. The chairs alone have to be high enough for mom to get up (19-20inches from floor to seat. She may need a chair with arms. My mom can’t pull herself up to the dinner table. I had to purchase a rolling table like they use in hospitals. Best thing would be to visit them and see or ask dad what he thinks you’ll need. It will cost a bit to setup. Someone also mentioned having someone stay with mom. Dad may need a caregivers break if he’s the only one caring for mom. You just have to have someone that cares as much as he does.
Good Luck!

You can get a high riser for your toilet so she can sit on it. they are relatively inexpensive and you can find them on Amazon and most pharmacies. Her doctor can give her a prescription for one.

To help her up and down the stairs, use some sort of belt (they also have them in pharmacies) that you put around her waist and help her get up. It takes a little strength. My friend who is a nurse practitioner uses one for her mother.

You can call up rehab places and speak with one of the rehab specialist to get more ideas.

Seniors need both safety and trouble free access. If you cannot provide it, perhaps you can visit them.
Making these changes are sometimes expensive, railings, ramps, but some ideas for cheaper solutions are out there. Does your mother have a walker? Medicare provides.

Perhaps your father can help find inexpensive solutions.

It is essential and will probably get more demanding.

best wishes