Yes, we do exist I would check out XYPN and NAPFA as sources for finding an advisor to help.  

Legal and advisable screening criteria include income verification (2-3 times monthly rent) and thorough rental history checks with previous landlords.

Check with your lender to make sure they are comfortable lending with this period of 3-6 months where your cashflow is light.In terms of updates and tenants, it sounds like you may have time to complete them at the end of each lease expiration.

The last factor, after doing due diligence is to do a gut check on your intuition. 

Right now, my only income in a weekly 300.00 unemployment check.

Some require an inspector to check the work each time, with me as the investor paying for those inspections each time.

Some title companies might assist in this process, but it's best to check directly with yours.

How can I check to see if the unit is illegal not?

Check with your county tax assessor. 

Please check out this recently published article on BIggerPockets which addresses your exact question - BRRRR financing pros/cons of all the options (Cash / Hard Money / DSCR / refinance options)https://www.biggerpockets.com/blog/brrrr-loans-what-are-the-...