i personally love this, instead of using your car i think that maybe it could incorporate the use of local cars (ones people steal to chop) and you could have to get a specific car to pickup the goods (or the goods would be in the local car already) and you would have to steal the car like any normal person would have to do. This would give the cops a little more edge to be able to spot out some of these deliveries so it’s not to op for crims but also gives another edge. The local car system would still be the same in the essence of after a couple minutes the car would be reported as stolen (like locals are normally) which would give more urgency as cops can scan the plate of the car and it would come up as stolen.
another idea is that you would need to buy a scrapyard car to pick up the goods meaning you have to spend a little more money to gain more money
idk what i said makes sense but i love the idea of cargo runs