When I mentioned $3k I thought he was trying to cover the whole 10x10. That is why I amended it and said about $1800. I have 304 diode boards. Running 3 at a time in parallel off the 260w driver. $900 was for my 4x8 but it would translate to less if I took out tool costs and such. I also got enough wire with that and wagos to do another 4 panels or more. I only need the sheet metal (which I use as my heat sink), the boards, more wire to use as plugs and plugs and I am good to go. I also have enough fuse holders and fuses to build a few more as well. So really $1800 is even on the high side for the 5x10 I would think.