The thing that was most worrisome for me was just listing my property and coordinating showings so I could put someone in there ASAP.Also, shout out to @Stace Caseria, while this is a business, you do need to take care of your customers and find the balance between the two.

Legal aid is there to help people deal with situations in a balanced way. 

Orange Beach & neighboring Gulf Shores AL has already been through that cycle where areas outside of the primary beach zone originally  designed to accommodate primary residences are now restricted, but the major tourist areas closest to the beach are exempt, creating a balance for residents & the visitors which are so vital to our local economy!  

My current system allows me to match dollar for dollar my starting/ending balances with my PM. 

Try to structure a deal with partner, using the existing HELOC + a note for the balance payable to partner.

Your new tenants have a legal justification to look to you to settle and return the balance of their security deposit.

If your plan is to use this to retire, why would you care if you only breaking even if you are reducing the principle balance for your future?

Go to yahoo finace and look at their balance sheet.

In commercial arrangements, profits can be assigned as premiums, but I really doubt any small HML follows such premium structures based on the balances.

I made a spreadsheet with our budget on XCEL but I have like 12 tabs - Bathroom has a tab, flooring has a tab, and so on, then I have a recap that shows Budget, Actual, Balance.