I’m using salad bowls for sinks in my trailer.
In the bath, I’ve used a $19.00 (Canadian) bowl from IKEA as a vessel sink.
In the kitchen I will use a 18/10 stainless steel mixing bowl, very heavy and substantial, made by Tramontina in Brazil. I bought it at a big box for $62.00.
This bowl is 8” deep, like most sinks in most stores, and 13” in diameter (13 quart capacity). I will cut a hole in the kitchen counter to flush mount it.
It’s easy to make a sink this way. You can do it yourself. Cut a 1 1/2” hole (or whatever is called for) in the bottom of the bowl with a hole saw. You use the “push” type drain available inexpensively at Home Depot, etc.
Goggle “stainless steel vessel sink” and you’ll find they start at $400.00. I’ve also seen in-counter ones at the fancy bath and kitchen shops for $400 to $500 and upwards.
You can see the vessel sink being installed here:
The attached photo is of the Tramontina bowl.