I plan to transfer my properties to management company.

And C is the best for the environment and the softest, but mechanically not the best.A comment on insulation in general: insulation does not keep things warm by itself; it only slows down the heat transfer.

If you drive your Investment Vehicle by looking in the rear view mirror (looking at past data), you will crash your Vehicle.

The same lender told me he would get me transferred into a new loan program, but Im having a hard time with that. 

In that case, you'll need a self-directed Roth IRA because Roth IRAs cannot be transferred to Solo 401k plans.

Then get insurance, and set up a Series LLC with a land trust so that you can separate our your properties into individual series or children, and then by using the land trust you can legally transfer the properties our of your own personal name into the land trust that is connected to the Series LLC without the bank or lender getting upset.

Use Zillow and rentometer.com to get data and analyze a few from your home to see what type if returns there are.If these meet your investment criteria then start looking in person. 

I was looking at data specific to 04086 but it may have been a broader scope.

Lots of great data and perspective on there. 

I often will also transfer the property into a land trust prior to moving it into an LLC, as when you establish the Land Trust in a specific way you can actually keep your name from the public record - but that is another discussion entirely.