That means that “house prices in the cities thus not only reflect the local factors such as supply constraints, regulations and zoning, but also global trends.”"

And there are some pretty stringent procedural rules. 

The proper procedure in my area is to contract with a towing company that gives you signs to display which list that unauthorized vehicles will towed, along with associated fees.

You register for a Commercial Activity License, which is Philadelphia-specific, and that number allows you to apply for a Rental License.I'd encourage you to look into the rental regulations in Philly because you generally also need a Rental Suitability Certificate, and you may also need a Lead Safe Certificate if renting to children under the age of 7, and you want to make sure that your duplex is legally zoned for 2 units and for the commercial use that you're planning.

contract assigning is selling real estate without a license and starting to be regulated more and more.. the laws are on the books but with all this guru training and such the internet spawned thousands of wood be wholesalers on the unsuspecting public and that has created  so many terrible deals.the ones that simply walk away from a 20 dollar EM deposit with no worries what damage they may have a caused a seller.. 

The amount of related regulations and case law is staggering.

Are there any experienced virtual wholesalers that can break down the process assignment to closing aspect of the deal?

Some cities have local ordinances regulating STRs, but those are more for Airbnb/VRBO type rentals.

Has anyone had any experience buying a condo in florida and if so, what were the regulations for a down payment?

@Johnny K. every state will have unique regulations with respect to the relationship between the landlord and the tenants.