This will give you one critical piece of information, that it may take X days to get an offer and sell, and the second item will give you what your competition is right now.

Any tips, warnings, or real-life lessons are welcome! 

You missed an important item: Depending on how a person does #1 or #2, it could get them: A fast-pass to the "Principles Office" for "bullying" and now there sitting in "detention".... 

If you pay off your mortgage (which is a good interest rate), you will likely burn through that cash flow as it is more accessible, AND that money isnt working for you anymore (unless you reinvested it).  

Is it true Avail would be providing you access to their credit history? 

Seller Pre-Sale Financing: Consider selling the tenant-occupied property "as-is" now to an investor, perhaps at a slight discount, which could save time and eliminate renovation costs.

@Jackson Pudlo I have house hacked both ways, during my 20s and 30s in large SFHs and now as I’m approaching 50 I’m in a duplex where I rent one side and have a tenant in the other.

On one project we did we proposed 36 highway accesses and were denied as been excessive. 

The have interviews, tips, and tricks to getting started.

However right now it is VERY competitive in the tax lien market so it is going to be very hard to find something good.