In addition, if you pull $50K out of that property, you'll be sitting at 90% LTV.

If you aren't doing this with an LLC or other company, then the money is "still all yours" - you can freely do as you please with those funds (once the rents accrue enough for you to have a comfort level).I would suggest you contact a good accountant (CPA) knowledgeable in real estate matters to assist you with starting up your accounting system for this rental.

I'd suggest talking to them and telling them that this is the third time and you are going to install something around the AC (and their expense), so there isn't a fourth occurrence. 

Additionally are 7% mortgages worth it?

So if anyone has any online groups or suggestions for getting started in the DMV area it would be greatly appreciated

Follow the guidelines, if any, for actions suggested by the arborist.

I'd talk to your bank before you stop paying and see what they suggest. 

Some additional references:https://www.biggerpockets.com/users/ZacharyCole/referenceshttps://www.biggerpockets.com/forums/92/topics/765347-rent-to-retirement-reviewhttps://www.biggerpockets.com/forums/92/topics/1116050-a-huge-win-with-cori-from-rent-to-retirementhttps://www.biggerpockets.com/forums/850/topics/895660-my-first-investment-property-an-out-of-state-deal

Unfortunately, the majority of investors that experience terrible service from turnkey companies, figure out that it's not worth spending tens of thousands of dollars suing their turnkey provider and just move on - which allows the turnkey provider to not change their ways and stay in business:(You should also check out this BP thread about the topic:https://www.biggerpockets.com/forums/88/topics/976647-turnkey-company-suggestion?

There are a lot of settings, so as Craig suggested, you're going to need to go in and make sure you've adjusted the sensitivity, etc...