You can end up with a double bookings due to VRBO's slower interface.

.: Mortgage payments increased due to increased insurance & property tax, owner working but accepted job paying much less than they were making @ previous job (24-years), exhausted 401k due to medical bills, etc., and need a break. 

Though U.S. recovery efforts after Hurricane Maria were slower and stingier than the response to hurricanes in Florida and Texas, Puerto Rico has access to relatively extensive American disaster resources.

I may not be the ideal example but i think that more homes will be sold by owner in the future but that is my random prediction and i think you should buy a duplex near a technical university or a medical university to profit off the future generation but like i said purely random speculation...

I have all these medical issues.

Below is an example of a Risk Assessment that you may find useful:Positive credit = Low Risk; accept applicantNegative credit due to Educational Loan Delinquencies or Medical Payments = Med Risk; approve applicant with increased deposit/co-signerNegative credit due to utility delinquency, money owed to a property management company or homeowner, car payment or unsecured debts = High Risk; turn down applicantUnfortunately, FICO doesn't do a great job of considering the above Risk Assessment when scoring a consumer.

rents in okc over 1200 per month have been coming down or renting slower for the past 6 to 10 months.  

Also, what are the peak months versus slower months? 

Houston is well known for its medical center and many nurses and medical professionals come here for work.

If it is for a retirement home type with medical assistance then you will need to jump through a couple hoops usually with the state/federal level in terms of paperwork.