First Direct Marketing Campaign Questions

[Rob Grove]

I'm about to do my first mailing campaign and need some advise. 

I just bought a list with 1000 names, I designed my post card and logged in today to buy the post cards they are 50% off. This got me thinking I should buy another list, which I already have narrowed down, which is 1500 names, and buy more post cards. Right now, I just have some money and no future budget... Which I will figure out later...

I've learned that repetition is key with the DM campaign, but I am wondering if I hit a larger market, would that be better to start

With the cost of stamps, I could mail out my first list 3 times,(i'll probably do it monthly) or I could mail out to the larger list 1 time. But I can't afford to mail out another large batch a second time, so I would have to do it in batches of batches of 835 which would be quarterly unless I got a deal from it, then I would put it all back in to Marketing.

Should I just focus on the smaller list or hit the bigger list?  Thanks in advance!!!!!!