If you have underground power service, there's no risk of the antenna falling into a power line. Often, you'll find that cable TV service arrives at the same location as power service, so you would likely find existing cable entering the house there (presuming there was cable service at one time). If cable (including TV, Internet & phone) service has been discontinued, all of the cable can be used to distribute your OTA TV signal.
If you add extra coax to run a bit further than a straight shot would be, a good amplifier will overcome the loss and still deliver the signal to the tuners. Here's an extreme example:
http://forum.tvfool.com/showthread.php?t=13659