Land Flippers how often do you send letters in a county?

[Billy Rogers]

I'm curious to know how often any of you successful Land Flippers send out letters in a county?   

I recently acquired a property through my first mailing and wanted to know how long I should wait before targeting that same county again.

[Joe Fairless]

@Billy RogersI'd ask @Seth Williamsabout this. I imagine the answer is at least once a month but he'll know for sure since this is his specaility.