Welcome to our forum.
I have problems every time a customer employs an electrician other than one of our experienced electricians. Every time. Every, single, time.Keep in mind that HotSpring (and Caldera) use a sub panel, and for some reason no electrician who hasn't installed one can understand why. OK, some of them understand why - but those usually end up putting the neutral wire onto the neutral buss instead of the appropriate breaker.So if your friend is open to reading the info, carefully looking at the schematics, listening to your dealer, then go ahead.On the other hand, if your friend puts the neutral wire on the wrong spot, it's not a really big deal to come back out and swap it.
I'm not an electrician, just a weekend warrior, and thanks to Caldera's excellent wiring instructions, I was able to do all of my own wiring.
There are 3 keys to a successful spa wiring job:1) Having electrical wiring experience;2) Having a good schematic to work off of;3) Actually USING the schematic rather than saying "I know how to wire a spa! I don't need a schematic".