I haven't read everyone's reply here, so forgive me if i'm an echo of another. However, network and find a partner / co-founder (or plural) with whatever expertise you do not have that is cornerstone to operating the company and making the product.
Maybe wise to first consider potential partners closer to home, of some degree within your network of friends and fam, with whom you also have some history of trust already established, who either can code, and/or can build the wireframe, and has plenty of experience sourcing and maging coders.
If the latter (sourcing coders, not partnering with them) you may be able to raise initial cash to pay for these in order build the beta product with a good pitch and your wireframe, but that would not be within the criteria of most intitutional investors.
You'll also want to be aware that 3rd party coders tend tend to tire of projects if the pay, or the work becomes uninteresting to them.
Sourcing code labor abroad may be less expensive, but your idea is less secure, and those guys tend to go m.i.a, etc, etc.
You'll want to protect the project with appropriate interest and reward for yourself and your partners.
If you have a legal partner that is interested enough to to provide services in exchange for vesting Into shares, that's can be a good thing as well. Otherwise, plug all that legal expense into your P&L / cash uses forecast.
In all, build a team around it.
Hope this helps!