Here are plans and measurements for nucs I make. I think they are simple and you can make 4 five-frame nucs out of one 4' x 8' sheet of 15/32 plywood that sells for +/-$10 at Lowes or Home Depot. I use them for swarm traps, queen breeding nucs, and I overwinter nucs in them. I also leave the bottom off of some to stack on other nucs to make 10 frame nucs. I use thin 1 1/4 inch nails, titebond III glue, and I paint them to ensure I get many years of service out of them.