We do have sources though for going into business with a talmid chacham. Then, you do the hard part and you also benefit from the talmid chacham’s advice!
Just be careful how you run the business. In Gittin in the discussion of darchei sholom that someone comes to Abaye and asks him to teach him, Abaye has no time because he learns during the day and works his field at night, so the student suggests that he works the field – and he does it by telling people at the bottom of the river that halakha is that top goes first to fill in cisterns, and to the people at the top that bottom goes first, and proceeds to fill in Abaye’s cisterns in the middle.
Abaye did not teat his fruit that year and, I presume, did not teach the student either.