I wonder if you could develop a specialism in household care for those with disabilities? So, taking pride in doing things a little differently if needed? For example knowing how to clean disability equipment/ adapted spaces
e.g.
Not finishing cleaning by piling things up in a corner where they become utterly inaccessible (grr! Why would moving away the graduated steps to access a shower be considered helpful in any way! Or pulling off the shower seat and placing it in a cupboard in another room?!).
Or knowing how to clean a toilet with a seat riser attached, which means not wrenching it off and breaking the screw on mechanism, making it unsafe to use, and n exciting surprise as the disabled person has to trust no one has come and broken the only way she can access her own toilet! Or alternatively, not vaguely slooching around the toilet with plastic seat riser fastened on it, without attempting to clean under the toilet rim so even though the toilet is cleaned twice a week it still ends up with black mould and stench!
Etc etc etc.
Just that sensitivity and knowledge would create an amazing 'added value service', imho!
An approach where you just asked how someone needs things left, what causes an issue, what would really help out, would be amazing.
I had to have a carer go round and undo so much of what the cleaners did in order to bring my own flat 'back up to zero' again. Eg plug sockets put back to their usual place, trip hazards, bed covers so I could get into my own bed without causing great pain and problems etc.
Cleaners where briefed on the basics but when it came down to it neither understood nor cared about how they left the flat or what the impact was either positive or negative. This is what happens when cleaners are employed via cleaning agencies unfortunately.
Anyway, I think a discount would be very good, but maybe beyond that, a more bespoke service, not replacing carers, but working with rather than against the way your client needs to use their house.
(Obviously with the right legal disclaimer and insurance so you didn't get the blame for a trip hazard etc)