Mailings costs and ROI

[Daniel OKeeffe]

A bit of confusion about the wholesaling model. From what I have been reading from different sources in the forums, the mailings seem to only become effective around the 4th or 5th mailing to the same group of people and the numbers thrown around seem to be approximately 5k people you are sending a letter or postcard to every 4 to 6 weeks. If what they are saying is correct, then you need to send out approximately 20k mailings at a cost of at least 10k to get one deal? Does this sound right to people? Does it make sense? Please tell me where I am wrong as this seems like a very high expense to get one wholesale deal under contract where you may only make a profit of 5-10k. I have to be missing something in my calculation.