I cant imagine many people will try to help answer that question. From what I have heard, you can get people to work with you if you go to Home Depot early in the morning..several people have confirmed that...but I have never personally experienced it.
Google Maps, might help you find good vendors near the work orders. We have tried that and had good results in rural states
Yellowpages.com, Yellowbooks.com etc might also yield the same results.
Thumbtack is also another option.
I remember the best results being from Yellowpages, Yellowbooks, and Google Maps.
*I do not condone subbing out Property Preservation work unless you have too much work for yourself. It is really hard to make money if you are strictly subbing out work and not doing some work yourself. It is too much of a liability, and it takes a lot of management*