Adding solar to your primary is typically a more attractive option than going solar with your rentals.

Should I be added to the deed, or would I still be subject to capital gains since I haven't owned it for 2 years?

I am adding walls and doors to make them 3-1's This will raise the rent some.

In Indianapolis and Kansas City where I'm active for instance, this would be a D class neighborhood.

What needs to be added or taken away? 

People go back up north when it gets so hot.One thing to explore and is an idea that is rocking right now in LA is the concept of an ADU [accessory dwelling unit] or guest units, people are adding guest units and doing ADu conversions - this allows you to take a SFR and add or convert it to a legal rental, as opposed to having to rent out an extra bedroom and deal with roommates, you can take that same bedroom and add a kitchen and bath and you have an ADU that can rent out for a premium.

Also, Alcoa, Jeld-Wen, Fabcon, and Tredagar films all have plants in the county.

I'd throw an ad up on Craigslist in Indy area and see if you get some bites.

I got tired of trying to analyze them separately so I added them together. 

Isn't there some old saying that the best way to get a tree is to plant it 20 years ago, and the second best time is to plant it right now?