Do you see "moving sale" signs in the neighborhood? 

MMost agents are not business minded so you will need to find the ones doing the most sales as they will need more help and most likely are business minded.

In addition, you will need to collect sales tax/occupancy tax, if you do not and get caught, you'll be responsible for the tax. 

I specialize in homes going into foreclosure and short sales.

In New Jersey you cannot become a broker until you've been a full time sales agent for at least 3 years.  

I had a real estate broker license for about 30 years but I never did that full time.Always remember to do the math analysis on your prospects and try to look at them before you make an offer or at least have a clause in the sales contract that allows you the time (usually about 15 days) to make a detailed inspection of the subject property and possibly back out of the deal without a penalty that will excessively hurt you.There is so much to say to you but I am bound to forget something.  

You can judge how long it took them by looking at when they purchased the property vs. when it was listed for sale. 

I would like to take the profits from the sale and purchase another property.

I just found that a ground rent owner is required to sell to a property owner and that the sale price is set by law. 

(Example: duplexes for sale in PG for almost 1/2 a million!!)