If hanging them in your garage is not an option, I bet there are some safe solutions to stack them and make a coffee table out of them, or maybe2 stacks of 2 rims for stools
This is from the website you proposed:
View attachment 3799
Ride height -~5 mm
Right height is a result of smaller rim and taller tyre wall, which is still ~10mm smaller diameter so ~5 mm lower ride.
I saw that too, and since I have already issues with my garage ramp, I was considering 235/40 R18 as it is actually the closest wheel dimension to the stock 19"