First, get a vehicle that YOU like, and second get one that does NOT require any modification (other than lights and braking) to be towed.
I have used a dolly, and found that much of what is said against them is purely personal opinion. I didn't have much trouble at all with the dolly.
I have towed Jeeps and a Dodge Ram 1500 four down. The Jeeps I towed with a fixed arm adjustable width 5000 lb. capacity towbar, which some people say is just too much trouble, and nearly impossible to hitch by oneself. I didn't have any problems.
The Dodge was a little bit heavier than the Jeep, so I found a used Roadmaster Stowmaster telescoping towbar with 6000 lb. capacity. The telescoping arms were not much improvement over the fixed arm towbar, IMO.
Yes, lube pumps are available for many automatic transmission vehicles. This is the type of modification I want nothing to do with, along with driveshaft disconnects. In fact, our PT Cruiser has a lube pump installed. I have never checked it for operation. It is too easy to put the car on a dolly, and I don't have to mess with the front end to install towbar mounts.
I have also used a flatbed trailer to haul a vehicle. It works, and the trailer was very handy for hauling hay. A trailer can also be backed up, whereas backing a four down toad or a dolly is not recommended (some folks do it anyway).