Equipment appraisal is a little different than real estate and it does not directly help me with my real estate pursuits, but most of my work is related to real estate transactions and I work closely with commercial and ag real estate appraisers.

If there is an illegal unit and there is ever an issue (fire, etc.) then insurance will likely deny your claim.

Unless the feds start taking drastic measures, boarder line illegal, then just expect the current status quo to continue.

Plumber said adding chemicals to a well is illegal.

What would be the issues with this type of transaction besides the obvious fact the buyer is overpaying for a property?

Is someone trying to make a transaction or develop a relationship?

I found a constable to serve her the summons and complaint form (categorizing her as an illegal occupant).

I definitely prefer to have a single account, so it sounds like I just need some good software manage the in/out transactions with the account. 

I don't believe there's anything illegal about it

As a side note, regardless of your brokerage once you get a certain amount of transactions and experience you can opt in to Redfin's referral program.