It's a cool idea, but I don't think it would succeed. Here's why: you need to build the machines and distribute them. Then you need to collect the money from every machine you distribute. Basically your potential customer base is limited by the size of your fleet. It's placing a major constraint on your entire business model, and it can't be avoided. It's a permanent issue. So while you're spending on this, the people offering a completely electronic service that serves the entire country are going to fly right by you in profits and viability.