do the numbers work out with a decent positive cash flow for any random tenant.
Also imho, if I were you, I’d do myself a favor and rent to a complete stranger, not someone I have any sort of relationship with (professional or otherwise).
Either you’re not going to be happy because you won’t be able to get the best price you can get, or the other person isn’t going to be happy, because they think you’re trying to take advantage of the relationship with you….or both…