Here’s an idea what if we did a quarterly schedule for " build events"?
January 1st- April 1st a contest
April 1st - July 1st a group build
July 1st - October 1st a contest
October 1st - January 1st Group build (end of the year build.)
A could be raffle/giveaway be held the second month of every quarter (March, May, August, and November). Doing this would give people a chance to possibly win a kit or a gift card (of equal value as the model kit) to use towards the next “Build Event”. This participating benefits our members who may not be able to afford to buy a kit or supplies for the “Build Event”. On the 1st day of that month there could be a poll for members to vote on the theme of the next quarterly “Build Event” At the end of the the month the winning build them and the winner of the raffle/giveaway is announced. This will give people a month to prepare and gather supplies for the “Build Event”.
If it was me hosting i would make the Raffle/giveaway model kit match the winning “Build Event” theme. For example if it was transforming MS the prise could be a hg wing or zeta.
I think this setup would provide plenty of opportunities for members to participate in builds. If USA Gundam store really wanted to they could ask some of the people they Sponsor on YT to advertise the forum “Build events”. Which could drive more traffic to the forum and possibly their store.