list source experts! help

[Mike Landry]

I just want to get some advice from the experts here. I'm targeting SFR in montgomery county Texas. The area has experienced 10% appreciation a year for the last 2 years. I want to mail to absentee owners with at least 30% equity. On the sorting options, should I use:

all mortgage

-combined loan to value

or

Property

- %equity

Redundant?

Also, what is the best way to filter people that have owned for more years?  And what is a good time frame to target? 10years ownership?  5 years?

property 

-length of residence?  (does this work for absentee owners?)

- last market recording date

- last market sale date

I just want to make the most effective list as efficiently as possible.  I'll also be sorting it by neighborhoods and targeting specific ones.  Any other tips on filtering are appreciated.  We plan on mailing about 500 letters a month for 6 months.  My wife has committed to HAND writing them but i think we will switch to one of the services around here in a month or two when her fingers fall off!  We are looking to be the end buyer and have the immediate cash for one deal!  Hoping to find possible subject to and maybe reassign a deal or two.