Who does these (not looking for specific companies), is it accountants, lawyers, agents, and/or contractors? 

Underwriting the deal with an underwriting model specifically built for syndication deals is key.

Are there any books or materials out there that specifically focus on buying properties in preforeclosure stage and sheriff sale?

As an out-of-state investor, I am interested in Alabama, specifically in Birmingham and Montgomery.

Whether you're working with residential properties, or specializing in a niche market, I'm keen to learn about what strategies have worked wonders for you and what tactics may have fallen short of expectations.Some specific points I'd love to discuss include:Where have you found the best leads or prospects?

@Mike Morehead STR's are still profitable in Cape Coral, but there's a very specific criteria set that you will be needing to target to ensure you're able to compete in an already competitive market.

I agree with others that adding amenities, specifically targeted toward those most wanted during the colder season can have a big impact on down-season occupancy.

- Should I try to keep looking for a different agent who has more experience with STRs specifically?

None, not a 1 EVER has connected the words "Minneapolis" and "Emerging market" since the late 80's and maybe very early 90's which was in connection to the 80's just more specific trailing opportunities in redevelopment from such. 

Again, nothing specifically prohibits it.