Patreon is generally for people producing something on some sort of semi-regular basis; webcomics, graphic novels, paintings, sculptures, music, videos, etc. In effect, the patrons are donating to help keep the creativity flowing- they want more comics, more art, more music, etc.
I have to admit that even after a cursory glance at your FB page, I really have no idea what you're trying to accomplish. Are you producing and distributing those LEGO models, or is there just the one model that you have on display. What do you need the funds for?
And 18th season of what? Have you had that on display for 18 years, then? If you take it around and have it "on tour" so to speak, I'd assume that a 'tip jar' or museum-like "suggested donation" box might be more appropriate.