Maybe I lost it in reading. Are you going to run over 700' of 5/16 tubing? Is there a main line involved? If it was up to me, I would skip the last 370' of tubing and make a collection area there. Use the $$ you would spend on Main line/tubing and tension wire and supports for an extra battery. I would use a Shurflo 4048. We have one with 120 taps on it. We built ours with a thermostat and mechanical ball valve all on 12v