Not betting on whether it will be built or not, but... but I will make a bet on both conditions (a) ballroom being built and (b) some future President not changing it.
So sure, I'll make a reaslist bet based on future actions on the condition that the Trump momument ballroom is built.
#1 If the currently proposed 90,000 trump current ballroom is built without Congressional approval. Subsequent scalling down the ballroom or future Congressional approval voids the bet.
#2 A future DEM President either levels the 90,000 square/foot ballroom or repurposes it to some other usage including. Such as a smaller ballroom with some areas reconfigured for other purposes, maybe, (a) office space, (b) security checkpoints, and/or a White House muesum. I said the "next President can" which is true, but now we need measureable scope for the bet. So the time frame is 3 DEM President's, which could be 12 to 24 years depending on reelection.
So I accept the bet under realistic conditions. Bookmark this post and let me know if you are able to collect and want to collect after 3 DEM Presidents.
Let's see if your balls have dropped yet.................................
WW