Interesting perspective — especially the headless + API-first approach.One thing that stood out to me is that even with a lean stack like this, the upstream address selection still feels like the real leverage point.

.- If there is cold air coming in, make sure it's not meant to feed the mechanicals and if not, try to address it.Late Rental Checklist: please elaborate.

Most of your questions are addressed here:https://www.biggerpockets.com/forums/51/topics/1167632-expla... 

The mortgagee is no where to be found and the original address of the company- Garnaco is defunct.   

I read to open the LLC in Florida, but when I do, the address state for the registered agent (me) defaults to Florida and can't be changed.

I don't believe you need a physical Indiana address to register your Indiana LLC with the SOS.

The property spans two streets and has dual addresses for the house and garage. 

Make sure you get a background check that shows you every tradeline, with criminal & background check, as well as all addresses applicant has disclosed in last 7 years.- We cross-reference the last 3 years of addresses against addresses on application, paystubs, W-2 and bank statements.Be careful of applicants with only Chime or Student Loan tradelines.

To deal with the short comings of the background check in #1, I use the credit report to determine if there are any old addresses for the applicant in other states and then I go to each state's court website and try to search for the person by name.

Your best bet is to look at each building and see what your building wide issues typically are then address.