Upon testing the system it was determined that the fuel efficiency, maintenance, and unforseen costs of partnering with my current cohort needs at least $250/month to "float". We opt for a raise of to $300/month as the goal to pay the driver a little more per hour and cover unforseen costs. If you need to see the calculations of the wallet to road cost, those will be along in a timely manner within the repositories we own and operate. We currently have our own fuel efficiency derivation methodology and an international supplier for brakes that saves $200 per year for brakes by internalizing the brake change within the tooling department of pennyfoot1ndustries as opposed to a business run car mechanic. This is just one option for support.