Long story short - I only own a car, and when I pick up a parts bike, or rebuild project, I rent a pick up truck. This has worked well for the last couple of years, but I recently learned of another option. My car has a receiver hitch ( class I - 200 lb max tongue weight ), and I stumbled upon a tow bar to flat tow a motorcycle.
The cost to purchase it was about equal to one rental, so I figured that I would take a chance.
I hitched up a parts bike to it the other day, and drove around a parking lot with it. I think that this just might work!
One note, you need to remove the front fairings, so that they are not damaged. Also, in a tight turn, the bike leans waaay over, but does not tip over / fall off.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Watch the short video review, that demonstrates how to load it.