These are professionals with additional training and a stricter code of ethics.

I own MTR's in a San Antonio medical center and I can give you this advise: Traveling nurses/professionals are looking for small accommodations (lower price point), they are concerned with safety, as they are usually women traveling alone, well-lit walkways by their parking spot, private entrances/bath/laundry.

Yes need to be careful for the title search/insurance fees.How do I know if my vacant land is not an improved parcel of land?

If you are not able to pay them back they can come after you for everything. it does not matter if its a LLC as the personal guarantee is in your name.I would be very careful over leveraging yourself. 

I'm not sure what part of FL you're in and what properties cost there but could you buy something locally and rent it out or do MTR or STR (to traveling nurses or corporate professionals and/or people vacationing)?

I serve as the acquisition manager for a private equity firm specializing in retail and industrial properties.I'm on the hunt for networking events in NYC specifically geared towards commercial real estate professionals.

I'd be careful making general statements about entire housing markets.

The most important thing to do is either you or your wife need to qualify as a real estate professional (IRS definition, no realtor license required).

We face a dilemma as we embark on this venture with a clear business perspective, committed to implementing best practices in property management from the start, including engaging professional property managers.

Your "opinion" doesn't help me defend MY professional appraiser opinion about the value of your property, but if you provide me data I'm not aware of, or haven't thought about, etc, maybe I can justify a different conclusion.Here's a thread where I posted a more detailed answer to what to do if comps are lacking.