What's more productive: Paying someone to drive/dollars, or mail?

[Sean Dezoysa]

Hi, I'm weighing paying someone drive for dollars to gather beat up house leads to use for skip tracing the owner, vs gathering probate and building code violation lists and mailing the residences and probate recipients. 

If you guys could do only one of these, is there a clear winner?

My thinking at the moment is this:

1) The probate list is probably the most productive option to start with based on courses I've taken

2) Code violation list is also nice and somewhat automatable (in the sense of outreach efforts)

3) Driving for dollars will require paying someone around $10/hr and I'm not sure what I'll get from that. I consider it the lowest option at the moment unless you guys think it's good (PS, due to work I can't do this myself, I'll need to and prefer delegating).

Thank you for any suggestions