Be sure to list some back up property on the exchange.

at least you will be able to back up your results with facts and not opinion or miseducation.   

In the event of any lease issues I would buy my little niece a burner phone and have her call in the middle of the night."

Funny, as your reserves and dry powder levels drop down from cash buys, you work smarter and build them back up organically.I may not be the one to ask. 

So you'll want to have a few back up contractors in each area of expertise on hand.

I'll also have to hire a property management company to rent the place out for me and manage it going forward (so, 10% there).Here's the math I'm looking at:Current annual gross rents: $16,800Projected annual gross rent: $21,600Management fees (10%): $2,160Net: $19,440 = $2,640 increased annual revenueIf I am spending $15k, it'll take me ~6 years to make that income back up.

Be aware that the interest rate on that LOC is variable (typically adjusting each quarter), so have a plan (back up funds) to pay it off quickly if the rates go up too high too fast for your business model.

I had a minor septic back-up in February.

My backup plan is to purchase more condos (~200k/each) which gross about 45k/year (net just over half that) and save up until I can afford something bigger.Ideally I want to stay in the same city with the multi and do a combination of long term and short term rentals.Thank you for your time.

Things have been rolling along well now I am going to have to sit a while and build cash back up.