I was going to use a boosterlinc from smarthome. Any thoughts about how well that works. My home is probably around 3,000 square feet.
IMHO I don't think Boosterlinc is a good solution as it only amplifies the X10 signal of one of the power phases in your home. You would need a passive phase coupler in addition. A "repeater" not only amplifies the X10 signal on the originating phase in the home, but also couples that amplified signal to the other phase. You have two power phase in your home. Each is 120V AC from "Hot" to the neutral line. Each is used for power to lights and receptacles throughout the home. Your 220V appliances like stove, HVAC, water heater, etc uses both phases. Since they are 180 degrees out of phase to each other, when combined, the total voltage (no longer referenced to neutral) equals the combined total of phase one plus phase two (or line 1 and line 2).
A 3000 sq ft home definitely needs a repeater and the XTBIIR is the best. If cost is a factor then the XPCR is available off eBay for about $20. But it will not perform like the XTBIIR. I don't think the BoosterLinc with passive coupling to the other phase will make you happy. It's signal will be much lower than what a repeater can do. Smarthome does have a plug-in repeater for a four pin dryer outlet if you have one. But the three pin dryer connection is more common.