You just need to work with active players.

One of the positive side effects of having a banking system dominated by 5 players with coast to coast coverage of Canada is that we have had universal, simple and affordable electronic payment methods for 20years ... tenants have had the ability to pay rent via e-mail for over a decade.While we still accept post-dated cheques and cash payments for rent, we have begun to charge extra for those methods of payment (because the bank charges us extra to process them).  

It is a rapidly shrinking market, about 10-20% the volume it used to be, with established, experienced regional and national players already in place.

There are lots of game players in the RE space.

@Isca Harmatz  Holten-Wise is the big player in the Old Brooklyn area.  

Be sure the person you flip the contract to is one of your core "players." do not assign it to anyone else.

Once you learn the rules, you will also figure out who the players are.

It has actually been seen that Bitcoin mining is no more a lucrative venture for small gamers. The latest study by Diar reveals that Bitcoin mining this year has actually not been a successful one contrasted to 2017, ...

Looks like there are 5 million players now in the US.

Pick areas that have a lot to offer....great schools, great jobs,  high traffic, close to major players like Trader Joes, Whole Foods, Starbucks etc.