Bird, well that a very funny idea, because for the last 2 years we've been calling it JW's(my 5yo) barn, becasue about the time it'll be done he's the one that it'll be for.
But since I have no help, except for a few extra hands for very rare times. I put all the floor joists up all by myself, cut each one to a custom length, laddered them up there and power nailed each in place. Took the better part of a year for just that.