Even though the market is slowing down now, which is healthy!

We then refinanced the property and it has given us $140k in cash back and continually produces $1,800/month in cash flow.

My parents are older and I am worried about their health. I

If you have a contract with the housing authority, and they have not exercised a termination within the context of that contract, I would first speak with housing and ask if they would like to pay out the contract over the next three months or in a single lump sum at the end of this month.If that does not produce the desired result, then you may wish to sit down with your attorney to determine your options and best course of action ... perhaps a letter from the attorney or a trip to small claims court may make sense.

If the property will produce a satisfactory cash-flow under our doom-and-gloom scenario, then most of our surprises should be pleasant.

There is not a single piece of literature produced by RDPD that isn't designed to upsell to something else that you "need" that's essential, and 'only they can provide'. 

@Brian Kasper last inspection on a condo for me produced a new HVAC system installed prior to closing.

The drawings they produce can be bid out to multiple different contractors for the best price and then they will proceed to ensure their performance throughout the project. 

Your income will increase with each positive income producing asset you acquire or control.If you have 10 assets with a current positive cash flow of $300 per month each & over time the debt is paid down & the net income increases to $500 per asset or more, you will have reached your monthly income goal.Yes you will have repairs & capital improvements, that's why it is so critical to buy correctly & make sure the properties support themselves.  

You'll want a healthy emergency fund in cash (I usually recommend 3-6 months of expenses) before you begin investing.