We need some fat cat with deep pockets to take care of some things. The part I see a big problem with in turning out large numbers on Jan 20, 2020 is getting people to the site. Parking down there sucks, so you aren't going to park 5,000 extra cars within walking distance. The VCDL mentions parking at Willow Lawn Shopping Mall and taking the bus down to it. That's not going to work well either. It's a small outside mall with limited parking and the busses can't handle 1000 people showing up at the same time, much less having room for 1,000's of extra cars in that lot. It's not going to happen.
Someone with money or contacts needs to find a common place, like Richmond International Raceway (a little too far from the venue), and let people park there for free and then it needs to be shuttle buses running to and from, enough shuttle buses to actually make it all happen.
To me, that's key in making the numbers large. If you have an organized, published place to go and park and step on a shuttle bus that drops you off and picks you up and the door, then you'll get a lot more people.
How someone makes that happen, I don't know. I don't know the right people to make that happen. Of course, the closer the parking venue, the less buses you need.