You mean like the model train set that my dad spent weeks setting up on an 8'x4' sheet of plywood with the fake grass, buildings, cars, and people that eventually was spent playing with in total of about 4 hours? Yeah, that one is in a box in the equivalent of my attic as well for the past 25 years now

The thing that's important to remember is that for your dad, the weeks of setup was also play.

I wish Lego's were available as a rental. I miss playing with Lego but have ZERO desire for them to occupy space in my house. If I could I could redbox/netflix a set, that'd be amazing.

Buy a 3D printer. Print your own blocks. Get tired of the blocks. Eliminate blocks. 3D print your next bit of enterainment

You clearly never tried this. The tolerances for Lego bricks to work well are too tight for what 3D printers can handle.

Then scale it to make the tolerances work /s

Or go to Legoland or something. If you have a kid even better.

LEGOs are available as a rental.

For some reason I hadn't looked into it, looking at a few services now, thanks for pushing my in this direction.

building it is the most valuable part

I did the same with model airplanes and cars. I had the planes hanging from the ceiling in my bedroom. Once built, I might have played with them for a minute by flying them around the room before hanging them. Some had lights that could be turned on for an interesting effect at bed time.