I seriously can't recommend this guy enough for general repair/building work...

https://www.youtube.com/channel/UCnorhjQR4zJkT7AVNhu395Q/vid...

Friendly, super knowledgable, takes the fear out of the DIY.

For electrical, I do a lot myself, but when it came to running a 50amp line + breaker panel inside my place (which also required outdoor ladder work) to replace the steel conduit indoors, I just hired a professional even though it was very expensive.

It's not the DIY aspect^, it's the idea of ProPress joint sitting pressurized behind a wall for a decade.

^ I'm knowledgeable enough to do my own wiring and plumbing, but pay for licensed/bonded contractors instead. I sleep better at night and my insurance company probably does as well.

Up to you, but it honestly really isn't that much of an issue and I'd trust a simple properly crimped joint (which is easily visually inspected with a simple tool) a heck of a lot more than a welded one that is impossible to see what the inside looks like... um, did I put the right amount of flux on? did I know to use the 1/2 of solder to 1/2 of pipe trick?

As far as insurance companies... I bought an old place... I'm finding all sorts of stuff that isn't up to code (hidden electrical boxes, in the floor!, with wire nuts and not even twisted together wire and not even grounded properly)... I'm bringing it up to code, with modern products... in a court of law, it is going to be hard for them to argue against me.

Depends on what you're doing. I've done quite a bit of DIY, and much of it is probably better than if I hired someone for the simple fact I care, and I'm not trying to do it as fast as possible.