The landlord/owner can only increase the rent 2 times over the course of a 12 month period even if you sign a new lease. 

Then have a sherif deliver the formal notice to quit to them and explain to them in person that if they’re not out by then you’ll have to take them through the whole eviction process which could damage their credit and make it difficult for them to find an apartment in the future.Your biggest risk here is if tenant B and C move out but A remains and drags out the process through the current federal protection period which now till September. 

This will be easier if your inspection period is not over yet.

I've started pre-leasing effort during the due-dilligence period but so far no LOIs.

I know the steps, like making sure I get the agent to add certain contingency to cover myself, add an inspection period, making sure it goes through my preferred wholesaling friendly closing company, etc.

This is important because although you can refinance prior to that period they would base the numbers on the original purchase price plus verifiable repairs as opposed to the new appraised value (Estimated ARV) which kind of defeats the purpose of using the BRRRR method. 

Ive got a 30 day inspection period. 

How does the BRRRR method sidestep that or is it normally a 6 month waiting period?

For $500k, you could pay 10% simple interest over a 15 year period, with a full $500k balloon at year 15.  

Hi Lionel,Make sure you qualify for multi-family financing with a lender, and know what the lender requires of you during the loan period, such as net worth maintenance.The lender may require closely matching asset experience, for some loans, etc...