I hadn't thought of the closet department as a potential source of a support. That would be a good place to start. I might use wood if I can't find anything else. I want a retro sort of look but I am using brushed nickel hardware.
As far as the counter top, it was pretty straightforward. We used a "blonde wood" plywood from Lowes for about $30. There was enough to do all the doors and the counter. We bought a 4 foot piece of light
colored poplar 1x4 and ripped it to 2x1 inches. We cut a 45 on the edges and glued and clamped them on the plywood. Unfortunately the counter is wider at the back so we had to route out (we actually used the table saw) the 2x1 on the back to accommodate the greater width of the fiberglass at the back of the counter. I am getting excited to put the sink and the repainted cook top in and see how it all looks!