I feel like the “rent a car” when you need one suggestion is a bit strange.
In general it seems like anywhere you could rent a car feasibly (you’d need to Uber, public transportation or have rental dropped off) one already has amenities nearby and other transportation options.
And where one would arguably need their own wheels more, none of those services are available or feasible.
Or folks there are making those suggestions are truly talking about sort of 1 off special situations. IE rent a car to drive through a national park instead of driving the RV.
Regardless of any of that, 4 down is far and away the easiest most convenient way to haul and use a toad. If it weren’t, the vast majority of toad tuggers would be doing it a different way. Followed by a dolly if that fits your style/vehicles
Of course there are other methods and some may work better for some than others depending on the person and situation.
But if you’re not able to discern that for yourself, IE asking the internet what you should do, then generally 4 down is the most convenient.
If you want to refute that, it’s fine, but then your answer isn’t objective, but rather , your own preference.