Help! My 1st wholesale deal under contract hasn't sold.

[Joan Soto]

Hello BP Community! I got my 1st wholesale deal under contract in Miami on July 21st, but it hasn't sold, and the contract expires on the 31st of this month. I'm new at this and fear I may have made a mistake either in my numbers, maybe I overestimated the desirability of this type of property itself, or something I'm not aware of. I wish to get your opinions, but I'm not sure whether it's appropriate to post it here, or share it via inbox. 

Any response will be appreciated. Thanks!

Joan.