The solution I give them is to narrow their focus on a specific market, study it, and get to know what a good deal looks like.

The investors that I have worked with in the past have found units from SFR to quads that are ready to close with conventional financing.Connect with me for any specific questions.Best of luck.

However, if you’re interested in a very specific type of property and a specific type of sub-market, it will be very difficult to find a wholesaler that meets your needs. 

Just find the tenant before you select the site/build the building because these companies have very specific requirements and they are not all the same. 

A seller may direct an agent to negotiate on their behalf within certain parameters or they may discuss how to present/frame a specific response to an offer.

The number of calls you make, are only important if you are guaranteed a specific dollar in return per call. 

Specifically, is the rental market stable, and is reliable assistance (like agents, property managers, contractors, etc.) available?

I like the idea of pre-foreclosure especially, but have not found up to date data for that specifically.

What did they do specifically?

I don't know your specific market all that well but have you done some analysis on your ADR during the high season X your high season occupancy rate and determined whether taking lower priced slow season bookings vs letting your property stay vacant during the winter averages out in your favor?