We fixed a long list of things that were wrong and raised rents.What was the outcome?

I was happy with that outcome.

Otherwise, you would look up the applicable construction code for your area and the associated licensure or registration requirements for various trades/contractors --- just call the town! 

What was the outcome?

What was the outcome?

If I can keep a trades person for 5 years I am surprised.The idea of having an Angie's list type of a service for investors seems good, but right now its competitive to get good people to do any type of work and I would be weary of hiring people from a list without a personal recommendation.

FTC (Federal Trade Commission) regulates advertising and in the case of rental properties, fair housing complaints could come into play too. 

I've thought about doing this sort of variant on the pre-sale reno, but it would require agreement with the seller and really putting a lien on the property to make sure you get paid.Anyway, I really don't understand your goal and/or desired outcome. 

Emails and texts are easy but I do suggest you keep track of calls, what was discussed and the outcome, the date, who you talked to etc. 

You have what many people don't have when they decide to invest - a verifiable skill used in the trade of real estate investing.