Your idea of the big kitchen aid mixers sounds like it would definitely work for you. Since they are so expensive, why not keep an eye open for one at second-hand stores, at Goodwill stores, or at yard sales when they finally start back up again? I'm assuming, of course, that NYC has yard sales. Do you even have yards? Thus speaks the country hick from Tennessee!!
I buy most of my goodies at places like that, and end up with things I could never afford otherwise.
Hugs,