While it may look neat to use ceiling tiles for a countertop, I don't think it's very practical. The only ceiling tiles I've seen are not flat and would cause a haven for bacteria growth, potential water leakage and a cleaning nightmare. I have to agree with your husband. Your countertop options are: new plastic laminate (the cheapest option), ceramic tile (maybe cheap depending on the tile and your expertise), solid surface (one of the most practical), concrete (expensive and hard to do right) and stone. Don't be scared of stone. Recently the price has come way down and still the only countertop that is something to brag about when selling your house.