Go to HD, Tom, if the local store doesn't know how to set it up, I can help them. You can cash and carry a good belt drive, what I have, (I think they have them on sale for like 229 or something with the battery backup). And it can be installed for $99 or $119, something close to that. I assume Cali is the same as here.
Most stores don't know how to do it, but I do, lol. Cheaper than the door guys or even our own Funish and install guys get for the same opener.
Ray