Personally I would want the purchase to make a tangible difference to my life. If I can't control, communicate with, or see my purchase, that's functionally equivalent to me not owning it
owning a passive lunar rover will surely give you some publicity and access to something (you can brag about it in some venues). People have successfully monetized more stupid things. I'm not saying _I_ would know how to get returns from that investment but I'm sure there are some people who would.