Driving for dollars- what is the best way to systematize

[Dax Gurr]

While I am driving for my job I see about 5 to 10 houses per week that are vacant, I would like to start mailing to home owners of these houses.  My question is what is the best way people have found to systematize mailings. I have no or very little time, but have some money,  Is there a service, pay someone locally? Writing one letter a days sounds like a waist of time and paying someone a dollar or so a per letter would be pretty low volume and difficult to find someone to write these letters.  Last part of the question, If I run into 5 or so vacant houses per week, is there another group ( mailing list) that could be added to the letters?