Add strips of wood to prevent equipment from sliding back and forth. Then paint desired color.
Set new rack as shown and slide tripods as shown underneath. The blocks keep them from rolling back and forth.
Arrange the rest of your equipment as desired.
I carry the total station in the backseat along with the data collector. When not surveying they are kept in the office.
A good surveying vehicle with four wheel drive for under $5,000.
With good care it should last 5 years.