cyclotegra

Hi there, Im thinking of swapping my d16z6 for a jdm d15b. I dont have alot of cash, and dont know what kind of money it would take to rebuild an engine first off, does anyone know roughly how much money it would be to rebuild an engine, or have someone do it, what all consist of rebuilding an engine. Or would it just be better to just swap and buy a new different engine? Im unsure on what the better route would be, so any advice would be awesome!!

James