That's fantastic. I don't have that many pallets for use, but, someday I think I would like to build a pallet shed, too. I would put it out by my chicken coop and run. Maybe store dry leaves and wood chips, feed, supplies, etc....
Please post some pics and your thoughts on using pallet wood as siding on your shed. I know there are many different ways of using pallet wood as siding, but I have not decided what method I might use. It would be great to hear from someone actually building a pallet shed and what method of siding you go with on the project.
And, of course, I'm interested in what you come up with for the big doors.
Anyway, hope you continue to post some progress pics. Everyone loves seeing a big project coming together.