Hey Mikey! I'd pace it off and sit down with a pencil and paper. On our stands we left enough room between hives to place the boxes we remove during inspections so we wouldn't have to place them on the ground. Each of our stands could hold 7 hives but we only have 4 hives per stand leaving the space as mentioned. There is always those times when the extra space is needed
but we try to leave it. Which brings up a good point: you mentioned keeping only nucs there, and i wish you well, but keep in mind things tend to change according to needs
So, if it were me, the stand would be: nuc, empty space, nuc, empty space, nuc, empty space, nuc.....and on and on until you're out of room, wood or energy :
Ted