We just moved to a new house and I had an electrician come out to make an estimate to install a NEMA 14-50 outlet. He quoted me $400 for a 30 Amp limit and $600 for a 50 Amp limit. He said that would just be basic wiring and the outlet if it can be simply added to the panel. After looking at the panel he said it was full so a sub panel would be required and with dry wall work that would cost another $1300 because he would have to re-wire some other lines. Good thing is I know a little bit about electrical systems. The panel wasn't full. There was a single phase slot open. After some closer inspection I was able to reconnect a few wires, make space for a 50 Amp breaker and install it. With a total of $50 in parts from my local hardware store I was able to do it all myself in about 1.5 hours including driving to get the parts. The installation was as simple as it could be. The panel had a breakout in the perfect spot and I was able to get the wires right through it and directly into the NEMA 14-50 plug on the wall. I needed a total of 2 feet wire. I'm just pissed how some electricians think they can rip you off. Most people are clueless about electrical stuff and scared of it's dangers so they blindly accept whatever the 'expert' says.