Myself I have a building  background and possess journey level skill in almost all trades except maybe doing concrete work and I am also an architectural designer so I perfer properties that can be increased in value through forced appreciation and look for properties where the zoning, set back, and other requirements allow for adding square footage to a building but others perfer invest in turnkey properties already fully occupied whereas I like working with empty buildings. 

In my experience the inspectors were fairly "petty" when it came time for the Section 8 annual inspection / rental increases. 

“We feel good about the business.”According to the China Financial Weekly, GEA’s net income in China has increased 80 percent since Haier acquired the company, and its revenue increased 11 percent during the first half of this year.According to: https://thinkkentucky.com/kyedc/pdfs/100jobs.pdf adding just 270 manufacturing jobs to should add nearly $30 million value added.This knowledge should make a compelling case for investing in Louisville, as if we need more reasons! 

I think the first time you clear away the "jungle" you indeed increase the value of the property.

What percentage should I increase it by?

I might not have been clear...I did not have PMI in my case, I just meant to advocate that I would get rid of it ASAP, if possible, as it increases equity and cash flow if renting.

Really good points to take into consideration.

By borrowing to buy you are adding risk but increasing your returns.

. - I have taken 3 loans from my TSP (401K)- I cashed out my Roth IRA, twice- I bought three homes using low down payment mortgages and lived in them as my primary residence (FHA 3.5% and 2X Conventional 5%)- I used the BRRRR method and did a cash out refinance to buy another property- I saved every extra penny for years for down payments- I took out a HELOC I have experienced considerable appreciation in some of my earlier purchases and I am looking at doing a 1031 exchange.At the end of the day, I found out that I wasn't nearly as limited as I originally believed.

One LLC is likely fine (many go without LLCs altogether) and more can be added as asset quantity and/or liability increases.