Why are there so few cat groomers about?
There are many reasons there are so few cat groomers about, it is a very specialist, dangerous and time-consuming job. I'm speaking as a retired dog groomer who has also groomed a few cats over the years.
It is also the reason it so expensive. Cats are completely different from dogs to groom, they bite, scratch, hiss, stress and combined with skin that is paper thin it makes them very hard indeed to work worth. A grooming salon is set up for dogs, clippers, blades, shampoo, driers etc all designed for dogs. Dogs can be groomed while other dogs are there, they are patient, with coats totally different to cats they're relatively easy. Also, dog groomers love dogs, as I did, it doesn't mean we like cats to the same extent so have no interest in working with them.
Cats don't like the smell of dogs, they take much longer to groom, they're not in the least bit patient, the groomer has to take twice the time if not longer on one cat than a dog of similar size, that is why they cost so most.
In the USA and to some small extent, the UK there are cat groomers, people who work with only cats and know how cats operate (a whole different ball game to dogs), have salons set up only for cats, do them one at a time, maybe only four cats in a day (when a dog groomer could do ten dogs) and will charge accordingly. If you find a cat groomer like this, hold on to them, treat them right (don't skip appointments, forget to turn up etc) pay them well and cherish a very special person who will love your cat, they are very special people indeed.
Oh, and by the way, your cat looks really well and your other cat will be fine in a day or two.