Right now the only thing in the 0-60k range in all of Nassau County on MLS is a house boat in port washington:) You can find some beat up properties in suffolk or some unrealistic short sales on MLS.

Nicer upper midrange homes are in the $200,000 - $300,000 range.

If you're wanting to do SMM and SEO, on the other hand, you're looking closer to the $35/hr - $100/hr range... or more likely, a hefty monthly retainer.

Do you know what a ballpark range/figure of the cost of such a conversion for a 16 unit building is?

This could push the operating expense ratio into 60%-70% range or even higher depend on management.

Estimates ranged from $4500-6000.

I've already been pre approved for a loan so I know the range in prices that I can work with. 

I just know that the homes in the area range from between 300-700k; I actually grew up in the area and my mother still resides about 3 minutes from the land.

The trust rates range from 15% on the low end to 39.6% on the high end.  

From this data, you can utilize a website bestplaces.net that will give you a breakdown of the percentage of homes that sold, in various price ranges, for a given zip code.