Sorry to tell you there no short cuts to a prof. career.

There maybe one solution and ironicaly its from the very source you dislike.. the Chain school. They ,on occasion, do take on prospective trainees( call schools in your area and ask ) . It may not fulfill your long term need, but it will put your foot on the pathway.

I should add, that there are numerous World class dancers that came from a chain school beginning ( I had 2 that I trained in their early stages )

And by the way, "sponsors " dont really exist for the teaching Pro.