This would be a dream till taxes.
I have a 24 x30 and a 24x 36 that is my man cave. It is fixed up with collectibles like a full Corvette billboard and a nose from a SCCA Trans Am Jaguar but I can still putt the wrenches out and pull an engine or other mechanical project.
I have heat, water and a flat screen on the wall. Porsche seating for visitors and a sound system that can piss off the neighbors.
This was my second shop I have built. What I have learned is no matter how big you build you are always 4 feet too short.