"Upon termination of this lease, tenant shall continue renting on a monthly basis until either party serves the other with a 30-day Notice in writing."

The way more challenging part is #1 finding the deal of course, #2 finding great contractors that would take on this type of project with payments to them working through installments, #3 finding great terms on your refi.My advice would be to look aggressively for #2 and #3, so if you do come across the golden ticket of #1, you are ready to pounce. 

@Saurabh Kukreja If you're able I would make the down payment from out of pocket right now and refinance both later then add a third.

I guess I’m confused by the skip tracing part? I

Not to mention, you've now become reliant on a 3rd party for income streams, and yes, they do occasionally run short of funding and, yes, they have no compunction with telling you to pound sand until they get new funding. 

I'm willing to pay for the full year in advance.ME: I'm sorry, but we clearly said in our marketing that this third-floor apartment has a no-pet policy.

However, I recently discovered that I'm missing about one-third of the rental income, and no explanation was provided. ( Actually, I just checked my account to get money: 10/2 $500, 10/17$700, 10/28$500).Originally, I understood that the management fee would be 10% of the rental income.

I know in California it is legal and the state acknowledges it however it does restrict the finder to basically introducing the parties and they can not participate in negotiations, etc.

How about using 3rd party management? 

The potential for a loan call is higher and higher with sub to the more parties you involve if that makes sense.Trying to take down four homes sub to and then do remodels to them all, and then list them on short-term rental sites, and get full permitting and ok for not just the STR, but for your renovations and all prior renovations maybe done without a permit, while on subto, sounds like a pretty big mess to me.I would consult with a sub to specialist and prepare for the potential of having all the loans called at some point.