The primary reason I am looking into this option now, is to prepare for future scaling as well as prevent items from falling through the cracks.

Proof of vandalism could be brought to law enforcement as well.

I hope this finds you well!

We are each willing to put down as much as $50k for a downpayment.We are also open to considering other markets as well, but Florida is a place we'd like to live in. 

If you mean "how often do LPs try to sell their positions," I can count on one hand all the ones I can remember, and that's over more than two decades, $400 million equity, and well over 2,000 investors.  

Anything over 30 days is considered a long term rental, so you will need a lease, do background checks like you would with a LTR.You could do well with that strategy. 

The increase in value to have a legal quad has been well worth the additional annual fees.As for the mail, put out four boxes aligned to the units in the leases.

In your experiences what websites or software works well for getting leads with accurate data?

You are well past that, so you should have no problem proving intent to hold for investment. 

You can be well compensated for your efforts, but you now have a job.