Making a profit with 30K for holding cost, closings and commissio

[David Soest]

Almost every deal I'm offered from wholesalers has about 30K in profit after the purchase price and their estimate of rehab. After paying closing cost when buying and then selling, holding cost, then commission when I sell it how do they expect buyers to make a profit? I have about seven sending me deals and there all about the same, 30K max. I use hard money so I have to pay 2.5points,12% while holding, appraisal, builders risk ect. Am I missing something?