it's gonna be expensive. you need to move water pipe and change counter tops , possibly together with the cabinet. and if you remove the island, you'll need to match existing tiles for the empty space under the island. easier if there's a basement and water pipe can be moved from below the kitchen without demolish the kitchen floor. if it's a slab foundation, it's both expensive and messy.
now that is just dropping pants to fart, and in the process making the kitchen even less convenient for some superstitious bull shit. plumbing, electric, counter top, likely cabinet, a few thousand dollars.