There is no money in cleaning stuff like this so wouldn’t take it on , in the past we got good results using damp microfibre and thin bamboo cane
There is if you work out an easy / quick way to do it.
It all depends what you call good money , for us doing stuff like that would cost us a fortune we do a lot of very well priced commercial and domestic it just doesn’t pay and isn’t worth the hassle ,maybe you are happy doing this type of job that’s fine crack on .