It pays to know what you are asking someone to do for you with a little prior research anytime you want someone to use tools. I have rentals, as a property manager for the past 15yrs, I'm very familiar with fixing kitchen/bath issues not to mention as the role of GC, dealing with subs.
First know what you have, because I'll guarantee no one you talk to will have a clue what is in an RV kitchen. They view everything from their knowledge of home kitchen design. Home kitchens have a 1 1/2" counter thickness on top of the cabinets regardless the material used. (you may find a 1 1/4" product out there, but not common) This on top of a standard kitchen cabinet gives a 36" floor to surface measurement. Standard materials for laminates, high density MDF, plywood. These are materials that usually are resistant to water swelling due to the glues and layers used. Both can be doubled to get the 1 1/2" thickness or a rim of material can be sandwiched between one thickness of decking and the cabinet....cheaper by a few dollars.
Any estimate made without the person doing the estimate seeing your RV set up and taking actual measurements is a useless waste of your time.
Your RV...12mm of interior Masonite (the material peg boards are made from) with a laminate on top and a drop edge. Masonite is cheap, thin, and holds water like a new sponge due to the amount of sawdust that make up the material. The cabinets in the RV tend to be taller than standard kitchen cabinets. If you put a standard kitchen spec top on RV cabinets, you'll end up at 37" or slightly more floor to surface. If you are average ht. or less, that will not be comfortable...at all. Not to mention, the use of a 1 1/2" top will interfere with any backsplash you currently have. Remove and replace $$.
Home Depot will most likely charge close to $65 per sq ft. for kitchen spec'd Corian. There are many other solid surface manufacturer's, but they will all come in about the same. They sub the job to a local who tacks on their profit margin as well. Stainless steel sinks are quite the pricey item these days...a big box 24"x19" brand you've never heard of, you're in the $250 plus range. The gauge of SS is very important (min. 16) as well as the sound deadening material used. Under-mount a sink.... costs extra....maybe as much as $100 more.
When all said and done, you could be looking at $100+ per sf. for what you described made, installed and plumbed and finished.
Laminates are easily replaced if damaged, even over top of the prior finish. Properly installed laminates are highly resistant to delamination from their underlayment if anything other than Masonite. Frankly, it's all we use in our properties for those reasons...oh, and the price...$15-$20 per sf installed by someone other than me. Closer to $7 sf when I do it. The downside is it's not wise to undermount a sink with laminate.
For my money in my home, (I really really really hate granite, solid surface, tile) I like phenolic resin countertops. A perfect alternative to Corian and other plastic, which is epoxy based. Phenolic has been around for a long, long time in laboratory applications and almost completely has replace the 'other' stuff. Totally water proof, for me has a 'cool' factor, takes undermount, and is priced right starting at $15-$18 per sf.
For your reading pleasure:
https://resources.workstationindustr...ch-one-is-best
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