Did you already compare it to actual comps (sold properties in the last 6 months?)

Show them what comparable homes are going for and that your price is below market.

Traveling to SE from NYC is inexpensive compare to Midwest or West coast. 

It appears that short-term corporate rentals (i.e. at least 30 days, but no more than 3-4 months) tend to have higher returns (principally in terms of monthly cash flow) when compared to traditional long-term residential rentals.

However, again managing my father's 4plex has been.... very, very easy compared to what I hear on these forums.

How hard would it be to replace the location and rent they are currently paying with another comparable unit?

But can't compare apples and oranges. 

If you stick to traditional wholesaling finding motivated sellers can be difficult and it is harder to compete with cash buyers if you must finance. 

Than compare and see for yourself. 

PMI =0.0085*950,000/12=$672 monthly.HEL 80-15-5 scenario)  HEL closing cost on 150,000 = approximately $6000.  20yr at 6.25% = $1096 monthlyThe calculation above is kind of comparing apples with oranges.