--Here I am looking for how and what they are inspecting the unit and their summary of things to improve on. 

Just my two cents, but why not use your skills as a contractor to improve the property.

As others said here, leverage can improve returns in general if you can get cheap money. consistent passive 6% over a decade with low inflation is not bad for many investors.

(i.e. disputing that comments were written in MLS listings after I sent the listing in with the comments highlighted;  saying that a sale hadn't yet closed when I submitted both the listing and the transaction history from the title company showing it closed 2 weeks before appraisal date)I am following all the rules and going through the appraisal management company.  

.- this was like 1% rule deal.

Typically no you would not be reimbursed for improvements but I don't  know the specifics of SC law.

Aspiring to leverage portfolio as it develops towards local community and cultural improvements that go hand-in-hand with top-notch financial performance.

Do you guys have general rules of thumb for averaging these percentages?

The only landlords I know that do well in this space own 30+ doors.It's simply the 80/20 rule. 80% of you tenants will be just fine and 20% will not.Other ways to improve your numbers are to own fully renovated properties and great property management. 

In other words the $3k/month would not matter if you turn out to be making a 3% cap rate in a 9% cap market.Next, how is spending $135k going to improve your gross income from $5k to $9k and how long will that take?