Good to hear from you. I did find some answers. I collaborated with my co-workers to review costs and technical implementations. I also reached out to one of my contacts that is a partner at a design/development firm here in Los Angeles that designs for social good. It's called SPARK6. He said they would be willing to build it for around 75K. So that is promising!
Sarah Story you know I was thinking that besides all the great services you are providing you can also have phones you lend to others if they don't have phones. And they could use my app on one of the borrowed phones in your cool helpful bus! :)