I bet if you focused 100% of your efforts in Lauderhill FL, you would be able to get a few under contract.

Your best bet is to go there on an evening and see how the block looks then. in a way you are fortunate because these are the summer months and you can get a good feel of what goes on around that house. if you see a lot of hanging around on porches or a house with a lot of traffic (foot and car), proceed with caution.  

So maybe the insurance policy is a better bet for me?

Depending on the zoning of your property, the configuration of your lot and the construction of the garage, you may not be able to get a CO from your city for the extra unit.Your best bet may be to make use of the space yourself, provided that your tenants still have proper parking.

Best bet if he/she wants to stay they must sign the lease or leave the property.

And I'll bet the market is very workable... you're going to do great there. 

Your best bet would be to find an owner that is open to seller carry.

I'm betting about 80k or so mortgage aside.

Seller financing is an equity based loan, look to the UCC as to default of installment contracts, they become void, points or loan fees are not charged on equity financing.......I said not charged when I should say, should not be charged as I'd bet sellers are not in compliance, they can just lose their note and suffer any consequence that goes with unlawful lending.

My bet is not necessarily that the listing agent has another offer for a higher price, but that he or she has another offer from his or her own client, thus a chance to get double the commission.