I know from searches that you can take a property, and 1031X it and purchase land for investment purposes.What if I want to take a SFH property that I have, lets say its worth 500k, and 1031 exchange it to purchase la...

If your total tax loss exceeds your net passive loss allowance, the excess loss will be suspended and carried forward to next year. 

Now they are excessively scratched (see photo). 

This is not possible - no DSCR lender will do this, this type of excess was a factor in the issues that led to the financial crisis of 2008, nowadays DSCR lenders (who sell to the secondary capital markets) will have to use lower of purchase price or appraised value to make sure there is no funny business going on with the valuation..

A decent amount of investors I know are buying in that area due to cash flows being in excess of 2% and for Section 8 rentals.

We have seen judges wipe out excessive charges.  

Still not excessive, but it IS more expensive than "personal".

I'm curious if there's more benefit to getting solar on an STR other than the idea of the energy cost savings being in excess of the debt service.For example, could the debt be utilized in any way strategically from a tax perspective?

I have moved my policies to excess and surplus carriers that bundle all my properties onto a single policy.

FWIW those holdings, almost by definition, aren't able to be all dollars, so I'm not sure I see how those holdings justify creating money way in excess of those holdings.