Hi @Carlos Rodrigues,Realistically, it's unlikely that sellers will get permits while in escrow.

I would mention to Tenant B that I was visiting Tenant A and smelled what seemed like marijuana smoke coming from their side and remind them there is no smoking permitted inside the house.

In order to comply with SEC regulations, there is no platform to publicly announce your deal to the crowd (both posting on Facebook and publicly announcing it at an event could be construed as a solicitation, which is not permitted under the structure that most sponsors in the group use).

Supplement this far simpler entity approach by ensuring you have appropriate types and levels of insurance, you operate your business in a manner in which your conduct is not considered an exclusion in your policy, you work with licensed and insured vendors, you execute contracts with indemnification clauses with these same vendors/ require additional insured status &  maintain appropriate licensing and permits.

Your policy may also cover soft costs like permit fees and legal expenses caused by delays.

Similar areas that have legal under utilized permitted space convert to max studios that you can fit.  

Make sure any renovations comply with local regulations and obtain the necessary permits if plumbing changes are involved.

FWIW Its California , you probably need a permit  to do just about anything as long as you pay the fee 

If you did a full repipe and gutted the entire property then I assume (in all that means) that there were permits pulled and this should have been caught when the inspector did their rough in walk through or atleast the final occupancy inspection. 

This normally is not a big deal and takes about the same amount of time as getting the building permit.