Like Stewart says!
Apart from basic skills the biggest problem would be getting good quality ply. The stuff coming out of China may not be so good but there is a French company still making the good stuff. You really would be better off getting BS1088 quality ply. Read the specs and check the ply yourself to make sure it conforms before buying.
Alternatively you could use the same method and build from foam sandwich.
Good luck.

I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!