I lived and had a business in Temecula since 1990. DO NOT LIVE THERE. Out door activities? Hahaha, running from a bank robber or mugger is more like it. Check the crime stats. Temecula is at least 22% mexicans, mostly illegal due to the loose mortgage standards, (and they bring the culture with them, and it aint your culture).
Traffic is horrible, cameras spying on you everywhere, virtually no good restaurants, people are rude and selfish, lots of white trash too. People live in a delusional state of mind. Vacant dumpy homes everywhere. Most new homes built like a notch above a cardboard box.
“Wine country” is a joke, most of the grapes come from Napa valley due to a fungus in the soil that has been there from the beginning of time.
I could go on for hours. And almost everyone I talk to who is a professional (programming, CPA, lawyer, etc) say the exact same thing.
Temecula started as a real estate scam in the 80’s, known notoriously as Rancho California. And nothing has changed.
Pick ANYWHERE but there.I moved my office to Corona, and even though there are issues there, at least there it is an established with nice stores and places to eat.
You would be much wiser to locate anywhere in San Diego. Even though real estate is hurting, the city will always have intrinsic value (old town, ocean, endless stores, culture, great restaurants, etc etc).