[2devnull]

I think you’ve defined a tutor. Tutors cost less than college tuition. And top professors answer emails from non-students, sometimes they teach for free on MOOCs. Perhaps you’re on a very narrow field where knowledge is extremely scarce, but that’s atypical.

[bombcar]

For the cost of a college education at some places you could likely hire a knowledgeable professor of the skill set you’re interested in to live with you for four years.

Nobody will loan you money to do that, howvevr.

[ALittleLight]

People would probably loan you money for that if you have the income or collateral to support a loan.