I forgot to finish my "thoughts" before going to get another cup of coffee...
For the guy with enough "skills" and experience to do it himself.... having a nice space to work in at home is paramount. It adds some value to the house (to the right buyer)... and certainly adds value to the guy living there and building it!
Personally - I actually moved to my current house - just so I could have room to build a shop (30 X 50). And I still have things done professionally. The '32 was built at Steve's Auto Restoration (a HORRIBLE EXPERIENCE)... and then taken to BRIZIO to get it sorted out (a FABULOUS EXPERIENCE)... In the meantime my shop has allowed me to help my Sister and Brother in Law completely rebuild their '69 Camaro... work that they could NEVER afford to pay someone to do. If they could build a shop/garage on their property it would be the very first priority for them.