San Francisco North Bay has great Tennis Coachings, both for adults and for juniors. In Novato, our San Marin High School Girls Tennis Team is up in the ranks in North CAL and California.
Here are the links to Tennis facilities in the North Bay
Weather in the NorthBay is mild and pleasant all year long, great for tennis. Gorgeous surroundings around the tennis courts and clean air are huge pluses when you play tennis or just do any outdoors activities.
In Marin County, Novato being the northmost town, is the least expensive place and most sunny place to live.
Housing is less expensive in Sonoma county and if you don't need to go into the city too often, is another great choice.
We are also close to Napa, where there are quite a few private, famous tennis instructors around.
All depends on the level of tennis you are interested in. Will you be coaching or learning?
What is your definition of "affordable". The Atlanta metro area offers homes in all price ranges and styles.
I recommend my city, Austin, Texas. We have a great climate, great facilities, and great people. As an avid player, I find that Austin provides year around opportunities with a large community of players. There are a few academies in the area for various ages of player from juniors to adults. Look into the Capital Area Tennis Association for more information on the local tennis scene. http://(www.austintennis.org)
Real estate is still affordable here compared to many other locations with similar climate and economic opportunities. Come and visit us here in Austin, I think that you will like it here.