If you have any investor friends in the area you can even get the ball rolling by seeing if they have any open places.

Working yellow letter campaigns is a numbers game and a long term project with a significant learning curve; there are several great service providers who have the necessary expertise and will pull a list for you and have done enough split testing to know what yields the best results.

To the best of my knowledge you won't get any of your social security benefits reduced since the rental income will not be included in the retirement earnings test but with a rental income that high, 85% of your social security benefits will be taxable so your social security will be reduced but not due to the retirement earnings test but instead due to crossing the "Combined Income" threshold.

Prob. not the best idea to test your theory as it can be a very expensive lesson. 

If #1-3 above are a go, then roll! 

( radon testing?

You only need 3.5% down and can roll the remodeling costs into the mortgage payment. 

That's always a roll of the dice though. 

This time I went in person with an oven thermometer to test it for myself and also to make it not so easy for him.

I am stabilizing my newly purchase properties atm and have elected to do it one at a time to increase the rent roll because they're so terribly low but am keeping my other buildings as is to minimize vacancy and stress level.