Another lwb to swb question

[kansas city cheyenne]

This is pointed at the people who have done it. If you started this with a truck that was a complete lwb and wanted to cut it down, just the frame for starters, how long would it take 2 guys who are pretty good at this kind of thing to do it if they worked from sun up to sun down? I have a short vacation coming up and that is why I am asking. I would hate to get half way through it and have to go back 300 miles to my house and go back to work. So just shoot me some rough estimates. Thanks in advance.
And the only reason I was asking about the frame only is because I am just going to buy new bedsides.