I would recomend An O/O Subcontractor thier own authority, vehicle, fuel, insurances, etc. You keep 20% of the gross for your time, energy, and hopefuly verry little agrivation. You pay the driver 80% all in plus F.S.C. and extras. Have a contract that is fair but still in your favor if they screw up. Also, if its not a good match or there is a problem, its easier to part ways for both of you.
Now, you need to make sure you have steady good paying work because, if you treat and pay an O/O right he or she will drive for you, be loyal to you, not steel your customers, and you both can make good money. If they want to play they should have skin in the game at least a vehicle and insurance authority your judgement call.
Personaly, I wouldnt want to worry abbout anyone driving my vehicles for liability reasons. If they totaly destroy my vehical, or, decides to desert it because the driver decides he has a problem with me and / or wants to screw me over. the only way I would consider this is if they were to have 100% liability and responsiability for the van / truck and do some kind of pay down on the unit like they will own it in three months.
Thats my recomendation
Bob Wolf