Great idea for a service!
My only suggestion would be to revise your route to/through OK to include OKC, rather than north via 75 as you posted in the map. If you stay on I35 to OKC, then take I44 to Tulsa you will pass through many more population centers (Denton, Ardmore, Norman, OKC) and can tap into a larger market (to include my brother and I for example!). Overall mileage will be slightly more, but this is largely offset by higher speed limits, typically less aggressive enforcement (stretches of 75 in both TX and OK where 5 over results in a stop), and generally better road conditions.