Looking for Advice

I need to make two bench cupboards 2m long, 840 high and 640 deep.



The top will have a 20mm overhang all round. Plinth will probably be 40mm square pine

and back ply.



I am looking at a face frame, two end frames and a middle frame from which to hang doors.



Now, I have some good quality T&G hardwood flooring ( scrounged of course!:D ) that is 19mm thick and

90mm wide. With T&G removed it ends up about 80 wide.



Should I make the face frame from the T&G? I have no idea how it would stand up to Pocket hole joints

or biscuit joints.



A second method I though of would be to make the face frame from pine and then anchor the T&G to it

like a skin. I know this will add weight but may well be a safer method as I fear the T&G will split on the end grain

if I try pocket hole joints. Biscuit joints may not be the strongest option.



I think I can make the doors from the T&G also. I can run it through a thicknesser at the club to lessen the

weight but it may need some backing to prevent warping and twisting.



What are the thoughts of the brains trust.???