When the market is more balanced, then it may make sense to buy a primary and convert it to a rental when you move.There are exceptions, but you will need to learn how to really analyze a property to know when the numbers make sense.

Like Bob, mentioned, perhaps they are wholesalers looking to take advantage of an unrepresented seller. 

If the property appraises at $500K, 25% higher than purchase price, either because you bought it for less or due to market appreciation, then you essentially get all your $100K back.  

BiggerPockets can be a great resource, and I know there's tons of information available on the Fort Myers market specifically.

I'll explain...When you purchase a property with existing tenants, who have a lease in place (in MN you can also have verbal leases), you'll inherit those tenants and the leases they signed with the seller on closing day. 

If you do a case study also consider what market appreciation and mortgage paydown would occur in both scenarios.

How much it rents for is not determined by what you'd need to make it a good investment, it is determined by the market. 

Since you're planning to buy your first multifamily unit, I suggest looking into markets that have great macroeconomics with growing population and jobs just like Columbus OH.

After going back and forth, taking the property off and on the market, bobbing and weaving on the price, waiting a couple of months to see any real action come in, I landed a client that was interested in the house.

The NOLA rental market, especially for the more expensive neighborhoods like the one my rental is in, has been slow.