Draw it out first, to show where need to place everything. And also help to be able to count out what need.
I will try to draw a diagram of what Adam did on mine, for bracing, and how made later.
I know for one we did, (and this will be dependent on if you can find your supporting pieces in one long length too), we had the following, or pretty closely.
For 10x20 foot shed.
2 5x5x20 lengths of pressure treated wood. These are front/back. 6x6 would be even better to move with I think.
3 5x5x10 lengths of pressure treated wood. 2 sides/1 center.
3 4x4x8 lengths, regular wood, for back corner posts and center one.
3 4x4x12 lengths, pressure treated, for front uprights PT as exposed.
1 4x4x10 length, regular wood, for post that is in between stalls.
These are guesstimates?
3 2x6x20 regular wood. For front and back length of building, these are what joists went on, third one was on front, lower down about foot, for stability.
6 2x6x12 regular wood. Four were for the sides at top and bottom, 2 were in the middle of sides, for bracing strength.
11 2x6x12 reg wd. For roof joists, (think that is what called?) but to lay the roof on top of.
8 2x4x20 OR double that if you are not able to get long lengths, as Adam had to overlay/splice 10 foot lengths for mine.
8 2x4x8 lengths, reg wd, Adam used these to brace walls on back/sides, on an angle.
Some 8 foot 2x4's, for uprights, to put interior plywood up against on the back on the inside.
Some 10 and some 12 2x4's, to go on sides for plywood inside.
For mine, I also had to have 2x6's of 10 foot lengths to put up to divide stalls.
Insulation roll for under roof metal. *also had WAY too much, so used it on sides and back too, which will help with heat this summer.
Assorted screws, nails, and metal screws of various sizes and type.
Joining plates? Flat pieces about 3x6 or so? Has holes in it, and when you butt one piece of wood up against another, you nail this down, 1/2 on each piece of wood to make it stronger than just nailing into it at angle.
Metal for building.
Anchors.. these are must have items. I have 2. And #9 wire.
If going to move it, could get hook/bolts to screw into one end of building at bottom boards.
I will take some interior shots this morning if can, as am taking Adam out there to get my trailer for other projects, and will be over there.
But if you can, go see if any lumber yard makes these up, as I could have gotten one for much less than building one cost me. Of course that one didn't have stall divider, but could have just had it delivered and done that one little bit too.