Car share option
I read the first couple of pages only so apologies if anyone has already mentioned this, but around these parts car share schemes are quite popular and not just for second cars. The fact that you get the kind of vehicle you need for a purpose is a big plus; sedan, ute, van, whatever, and all pretty close by.
The major drawback of car share schemes is the fact that you have to return the vehicle to its designated pod, so one-way trips are off the agenda, or else you book the car for the return journey as well with the result it is sitting in a parking spot for several hours costing you money. If, on the other hand, you could drive the car to wherever you want to go, get out, and then dispatch the empty vehicle to return itself, slowly and carefully, to its dedicated location? When you want to go home you book a vehicle in the vicinity, which also returns itself after you get home. I can see that changing the economics of car share quite a bit.