I am also thinking about having rental trucks on site too.

We can meet at any of my sites or yours.

Any tips/suggestions ?

Locally, I know an investor that runs a crazy profitable trailer park where he is probably pulling in a 20%+ annual return on his investment - but he has to self-manage because no one will touch it, collects rent and deals with evictions armed, and has several "overseers" living for free on site to make sure no one burns the park down.

Also, any tips on how to respond without sounding snarky?

Its a gamble to go the permit route or not in Philly and absolutely matters the neighborhood/your neighbors as they are usually the folks that will call L&I on you OR if your property is near other construction sites where inspectors would be traveling to/from. 

Provide four to five copies of drawings size 24"x 36" and 11 each Site Plan/ Boundary Survey.

Quote from @Tyson Thompson: Your best option is to use a data site like AirDNA. 

Hey everyone,Are there any sites you would recommend for market research on an area other than looking at census data?

What tips or advice would you recommend to ID these agents and how would you go about trying to build a relationship?