A numbers game implies you will eventually get success guaranteed.The fact of the matter is unless you target every single person in the USA, AND there is a guarantee that at least one person is motivated, AND there is a guarantee they get no other mailers, or temptation from competitors and they pick you... 

@Jerry ZhangYou cannotYou can give a personal guarantee but then you would have to have other assets.What could happen and we have seen many times is they go into default and the 20% equity cushion goes out the window due to late fees, accrued interest and legal costs.

While its nice to borrow as much as possible, the risk involved can sink someone as in most instances their is personal guarantees involved and lenders will bankrupt sometime to try and get every penny they are owed. 

I have 0 debt, and a 770 personal credit score.

Any resources, tips, or personal experiences would be incredibly helpful as I explore this investment opportunity!

Buy in super small towns and they may not have a plumber, electrician or HVAC person who even wants to visit your project?

Assuming your investment projections is 5+ years, it's usually worth it to sacrifice a bit of cash flow to prioritize growth in my personal opinion.

That bathroom you mention may have to be torn apart and redone, it depends largely on the individual Inspector that you deal with.I would go to the County/City Building Dept counter and talk to them in person.

That protects us personally from liability because we are not personally making any decisions.  

I personally don't care.