Regulations.

Obtaining knowledge of foreclosure laws will be helpful as they regulate the rights of both borrowers and lenders in the event a borrower fails to uphold his or her end of a mortgage agreement.

if you have a large group of investors then you should make sure that you are in compliance with SEC regulations.

File a complaint with whatever agency in your state regulates mortgage originators (presuming this person is licensed or registered, which you can check on the NMLS Consumer site).

I know based on IRS rules I can't get the same benefits as the funds, but I can still invest the funds capital as long as I abide by all regulations.

You won't believe how expensive they can get to build and then there are a lot regulations that go with them as well.

If you want the definitive answer on CA ADU regulations email ADU @ the HCD domain (BP does not allow email addresses but you can figure out).  

Right after we purchased our triplex, they passed the first round of regulation requiring permits and a set of rules to follow (January 2019). 

@Da Shiek WoodardI would suggest that you purchase a multi-family property (as your primary residence) that you would be comfortable living in for one to three years (depending on your mortgage companies rules and regulations).

Is it federal or regulated by state?