We bought a used spa from other TVer's. Had T&D move it. Cost was $275. Additional fee for "hook up and instruct" of $80 (well worth it). T&D guys were great.
Previous owners had it in an inside, enclosed, lanai (actually like a room). We had it installed on our screened lanai, under roof, not birdcage.
We had 220 installed by Pike's Electric, recommened by T&D. The cost was $850. Pike's said that's pretty standard cost, unless you have some issue they need to overcome. Most TV houses don't. We did get some phone estimates from other companies, and they were within the same range.
LOVE IT. I'm sure the honeymoon will wear off.....just look at all the spas on lanais, with nobody in them....but for now, all is good!
