You might just be held at the front door.

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases.

That's not exactly an up and coming area -- I'd research who built them - can likely find that by going to the SG County Recorded Docs site or by seeing who pulled the permits during const -- Wichita has been on a duplex building boom -- look at the tax value -- They probably have that or less in it on the build - I also doubt they were built to be quality long term -- things such as the trim/cabinets etc -- they all look like the cheapest stuff a guy could buy - if the cabinets aren't oak and there is MDF or pine trim and pre-hung doors with engineered wood jams I'd run.  2-3 yrs ago for $180k -205 or so you could buy duplexes in Maize, Kechi, Valley center all day to builders that were selling them off to investors - not worth that in that area.

Facebook has scams.Craigslist has more scams.I have about 50 doors.

Received access to mortgage portal to ensure all payments are made (including escrow).Anything else here I should do or not do if acquiring for the long-term?

I currently own 4 doors over here in the Southern-Orchards and Hungarian Village part of Columbus.

Prepayment penalties are a thing of the past, so dump your bitcoin into paying down the balance (and, possibly, dropping the PMI) after the fact - no one sources where you make your normal monthly mortgage payments from.It's going to be in limbo and a giant "it depends" until such time as someone opens a Bitcoin clearing house that does all the little compliance and PATRIOT Act things that Wells Fargo and Fidelity do, or (more likely) until such time as Fidelity or Wells Fargo adds Bitcoin to their financial service offerings. 

Quote from @Chris Olandese: Stop expecting her to respond.Post a notice on her door and take a picture of it for evidence.

I think you can definitely run into a potential guest using that against you in the near future and opening the door for liability. 

I don't have a ton of properties but are now up to 5 properties 7 doors and for us it has taken anywhere from a few days to a month to rent out our properties.