@AppallinglyReheated I'm really am truly sorry that you are going through the situation that you are, it does sound appalling.
I would agree that disabled children and elderly do tend to be prioritised due to increased vulnerability. And I'm sorry that this may have impacted you.
To relate more on what I have directly or indirectly experienced; had three friends leave abusive relationships; one went to a refuge (that does have disabled facilities), another went to a friend and then onto private rental, final one emergency accommodation (which in my opinion could have been for disabled - ground floor, big bathroom, open plan).
With regard to what we got for various relatives wheelchair bound - installation of ramps, hand rails, wheelchairs, beds downstairs, commode etc all pretty quick.
In one house there already was a downstairs toilet and person refused stairlift so spent the remaining time having bed baths.
In the other two initially they still wanted to sleep upstairs, so we had to get stairlifts and downstairs loos put in because even with the lift they couldn't make it upstairs in time.
We didn't adapt the kitchens because none of them were remotely well enough to be cooking and low appetite etc.
In one case they had the money saved and took it from pension. In the other they had to take out a loan.
From the beginning of enquiries until we got it done it was 6-12wks.
The majority of people with disability have not been disabled for their entire lives so there would be some facility to have some savings. For others, disabled from birth, their needs can be gauged ahead of time.
Genuinely, I'm so sorry for the situation you are in, but I don't think it is the reality for all.
If this has been going on for six years, would you not consider selling your house and trying to buy somewhere more suitable? Please forgive me for being naive with that question, but a terrace for any of my relations with wheelchairs would have been disastrous.