Welcome to the MySensors community @jamesmc86 ! Radio range is very hard to predict. It depends on so many factors. But the cheap nrf radios generally have a range of 10-50 meters, so 30-160ft. That can be extended by using better antennas, better location of the nodes and the gateway, power amplifiers and repeater nodes. If you are not in a hurry, order a few and see what range you get. You can use @AWI's connection quality meter to test the range.