Build it yourself if you are good at building that kind of thing and, more importantly, suck at doing other things that provide more (fungible) value.

Or if you enjoy the process of building it. Or if the process of building it will help you relax or something so that you'll be able to do more things-that-provide-more-value later. Or if you're trying to impress someone. Or any other of the reason people have hobbies. (Also, “suck” suggests a much lower threshold than there actually is, especially in times of unemployment and recession. Telling people who have to cook because they can't afford eating at restaurants twice a day that they “suck” at making money sounds bad to me.)