Unless you have your requirements down to the smallest detail, which is rare, it will probably cost you a lot more to have developers spread out in different pa

Unless you have your requirements down to the smallest detail, which is rare, it will probably cost you a lot more to have developers spread out in different parts of the country. You are at a phase where you want rapid prototyping to discover what your real requirements are. Outsouring at this stage is a bad idea.