I have a friend that has done pretty much the same thing, although he hasn't found a tech cofounder yet.
My recommendation to the business types is to spec it out. Even if coding is beyond you, using something like Balsamiq to create a prototype that you can workshop, usability test, gauge interest in, etc. is a big help. Even if you can't convince a techie to join you, they'll be more likely to help point out the parts that will be easy or hard to implement, which can help define your MVP and estimate startup costs if you decide to outsource it.
My recommendation to the business types is to spec it out. Even if coding is beyond you, using something like Balsamiq to create a prototype that you can workshop, usability test, gauge interest in, etc. is a big help. Even if you can't convince a techie to join you, they'll be more likely to help point out the parts that will be easy or hard to implement, which can help define your MVP and estimate startup costs if you decide to outsource it.