Any excess amounts in the master are then assets or liabilities or capital of the master which are noted on its books. 

I hope to make a bit more on deals, but not loosing money with a huge learning curve is a positive.

9) adding multiple ADUs or adding an ADU to a quad looses F/F conventional financing.

You waive the excess.

I will start loosing house depreciation advantage  after 2027.

When a tenant moves out, transfer the deposit back to Checking so it's ready to apply towards expenses or refund the Tenant.If you end up with excess funds in the Checking account, I recommend you transfer it to a third account designated explicitly for future investments.

Just make sure you set enough aside for capex, vacancies, unexpected insurance increase, taxes, tax professionals, and local considerations (excessive heat? 

FYI, over the years, we've also learned to save a lot of money wasted on excessive management labor costs (we call them "stupid trips") by planning the occasional weekend to drive down, inspect our units and address any labor-cost intensive items that we can do over a 3-day weekend. 

In a loose sense, I would call any lender a "partner" too, since they will require not only your monthly payments, and will require regular reporting as well on the operations of the property (but this is a more semantic and philosophical discussion).But, ways you can try to come up with that money: refi your home and/or investment properties.  

Our lease calls for no nuisances such as excessive noise.