Purchase price: $619,000 2 family house in new york city. i rent out to city government programs.

This is my 7th purchase and 5th flip.

I really want to jump into it as soon as possible but I know an emotional purchase is not smart.

(You just need to be really good at spotting the big capex stuff up front and accounting for it in your purchase price.) 

The RGV itself has several great investments and worth investing here for multi family.I recently sold a 18 unit a month ago and my same investor is purchasing another 36 unit from me and after funding he'll be picking up another 38 from us, this gives you an idea of opportunity in the area. 

My main question is for condo-purchasing: If I purchase a condo in let's say Brickell or Wynwood, could I say it is more likely to rise in value long-term (15-20 yrs) vs. a duplex in Miami shores?

My last purchase is up over $540k over purchase and rehab costs.  

If “wholesaler” (used in the sense of contract flipping, not people who close on purchase and resell) were required to disclose in writing to home sellers that they are not purchasing the home, are only trying to “flip” the contract, and the sale will only close IF a buyer at a higher price can be found, would this eliminate the need (if a need does exist) for government regulations being enacted and or for “wholesalers” to be licensed real estate agents?

I have an opportunity to purchase a 3/1 single family in my area. 

In todays market, they are most popular when purchasing a larger bundle, needing flexibility on a bundle (lower purchase prices being allowed for example), or when cross collateralizing equity as downpayment.