The problem at the moment is that we are in a Catch 22 situation. The Baht Buses wont return until there are customers to pick up. Conversely the customers wont return until they are sure there will be Baht Buses running.
What we need is some wealthy local firm to sponsor some Buses for a period of time (guaranteeing a income for each driver). After that period let the drivers decide if there is enough customers to continue.
There must be one or two large local firms that could help. I can think of at least one.