On: A “bike platform” that temporarily swaps one car p...

[nybble41]

In my area you'd be in violation of local parking ordinances after the second step. Trailers, or vehicles with trailers, are only allowed to park alongside the road for a few hours at a time.

[gpm → nybble41]

What about a pickup truck though (admittedly, harder to lower to the ground...)

[jschwartzi → gpm]

Just get one of these and build a custom chassis for it:

https://shop.ford.com/build/chassis-cab/#/chooseyourpath/