What does it cost?

The diy approach is a huge cost savings.
To pay a shop, lets be conservative,$25 thousand, may get you pretty close to a nice car.
I can say for sure that if this is something a person was seroius about, putting money into quality tools, 10 to 12 grand worth would get you well on the way to doing a majority of the work.

The needs should outweigh the wants.
I want a rotisserie, thats next.
Custom built by me.