Yes, I only have a little portable circular saw and drill and it wasn’t too bad, but it would be a snap to make with the right equipment (table saw, chop saw, etc.).
Tnutz for extrusions and fittings! They’ll cut it and machine it for you if you plan well. I used their hidden counterbores and hardware to connect everything. I also plan to use them for the roof rack.
Owach slam latches, 1/2" depth (amazon)
Polymat carpet (amazon)
drawer slides, 28" (amazon)
1/4" wood paneling
I had a sheet of half inch plywood lying around. I suppose that would have added another $50 or so if I had to buy it now.
Looking back at my receipts, the Tnutz order was also about $50 more than I remembered- shipping was expensive. But still worth it!
So realistic total start to finish: $250