Well I'm not from TX so I can't recommend a shop, sorry. I can recommend that you can change the TB and water pump without removing the cam sprockets. I just did this last weekend, and in another thread I posted a tip on how to hold the inner TB cover out of the way for easier access to the water pump.

I work on my own cars as much as I can, including timing belts. When I replace the timing belt, I always replace all pulleys plus the water pump (unless a pump had blown prematurely and was recently replaced) (and this is only if the water pump is indeed driven by the timing belt, and not easily accessed unless you are indeed digging into the guts of the car - like the aveos) The water pumps are relatively cheap, and you're already in the guts of the car. I'd hate for the water pump to blow a month after I just serviced the timing belt, just to have to dig into the car again.

The job itself is not that bad, even for "small repair" kind of guy. As long as you research the repair (there are some great walk-throughs and threads here and elsewhere). But I completely understand where a lack of a garage would prevent me from doing it - I've had that issue before.