He's getting downvoted, but he's not wrong - however, finding someone who specializes in doing this would be hard, and knowing how to word it so you can use "standard crews" would itself be $2-3k for a GC.
This is the danger of "cheap projects" - they can grow legs before you know it, and you end up paying half the cost of increasing the square footage of the house (or the garage).
This is the danger of "cheap projects" - they can grow legs before you know it, and you end up paying half the cost of increasing the square footage of the house (or the garage).