Oh, well if he has built things before then you have a better chance of successfully completing it. I would take it. Even if I didn't get everything done by the time it was move in if you get the most important things done you most likely will be fine unless the folks you are going to be renting from are just complete jerks. Since the porch is actually a landing and staircase I would focus on that so that you can actually get you stuff in. You can hang the cabinets after the fact if you have to. Just try to finish one room where you can put all your boxes and then as you finish the kitchen move all the kitchen stuff into it then the bedroom and move the bedroom stuff into it, etc. It is a lot to do in five days but it beats being homeless. Plan on lots of coffee and tea and energy drinks. Peppermint candy is good for alertness too because you are going to be forfeiting a lot of sleep. Vitamin B complex. And remember be careful of operating power tools if you have become exhausted. The best you can hope for is making the wrong measurement/cut the worst is a trip to the emergency room.
I'll leave you with a quote from my Army days.
"We the unwilling lead by the unknowing have done so much with so little that we are now qualified to do anything with nothing!" Good Luck!
It's just in their nature.
