You can reuse most of the outside coax but most are the doublelet and would need seperation. (removal of the entire length) Depending on your range to transmitting stations, an outside antenna would run arounf $70. for a 50-60 mile range, Coax should be new, from the 300 ohm balun on the antenna to the first entry point in to the home. Every barrel connector used is going to reduce the signal strength a bit and it will add up after two or three. Best to use one single run into the home to the primary set. I'm looking for a 30 foot mast, a 60 mile antenna ( there's no difference in HD antennas) and will feed three sets from an amplifier/split unit. The balun and all connectors outside will be wrapped with elec tape and sealed with silicone. That will outlast the antenna itself. Once inside and amplified, I'll split the FM for the AVR.