Counter tops are a challenge. At the upper end, there's Corian, and at the lower end, Formica. Maple countertops are also popular, with IKEA a popular supplier.
One problem is that an ambulance action station countertop usually has about a 1" raised rim on it. If that rim wasn't needed, the cost would drop like a rock to use Corian. In my own case, I was quoted $800 for a 2x4' countertop with a raised rim in my ambulance. The fabrication costs are what really run the costs up on Corian - I priced doing the job myself, and the tooling and adhesives are expensive enough that I wouldn't save a lot with a 1-time use.
One option I like is to replace the raised edge with a flat edge. That way, I'd just need a flat piece of Corian for the top. If I can find the right sized remnant, the cost would probably be about $200-300 for the piece I need - and I like that a whole lot more than $800.
My backsplash is Formica right now, but I'm planning to replace it with some 20 gauge brush finished stainless.