I got 2" polyiso foam with 3.5mm honeycomb skins with 17oz woven roving with gel coat on one side only. I ordered 5 panels 7 wide by 14 long. each panel was just under $900
I had my panels made by these guys: https://www.fiber-tech.net
they can make pretty much any panel you would want.
i went with a 2" "cladfoam" panel from them.
You will save a TON of money upfront but obviously putting it together will be much more difficult than with a kit from totalcomposites