Critical issues will be taken care of quickly and efficiently. 

I am thinking energy efficiency and water saving . 

If you have extra money to give away, I guarantee I can find charities that are in greater need than your tenants.I also disagree with small increases over multiple years or even over a one-year period.

Let’s clarify, our industry typically defines being an “experienced borrower” as having at least 3 flips in a 24-month period.

@Jim Clark here is a list of lenders offering non-recourse loans to retirement accounts:https://www.biggerpockets.com/member-blogs/2810/50272-list-of-non-recourse-lenders-for-self-directged-ira-and-401kSome of them have seasoning requirements in place, meaning that if you are doing cash out refinance within short period of time from the purchase date you won't be able to use the appraised value of the property, the value they will lend on will be based on the purchase price.

You will only have "contractors" coming through during your inspection period. 

How working without a clear scope of work and a basic understanding of residential construction project management, as @Frank Geiger mentioned, just a vague idea that you're going to begin at the beginning and end at the end, makes it even worse.I started on a very small, limited flip, a basement efficiency apartment.

How to perform your due diligence and navigate the contract period.

Hello, I was looking for the most efficient way for tenants to pay rent?

The stock index fund will probably pay out less dividends & they only sell stocks when the index composition changes so probably more tax efficient.