>>88236998>>88237600EN could easily do 8-10k in a venue that's easily accessible. Tokyo works because it's got huge connectivity through train and plane, and a huge infrastructure of hotels all around the city, so you're liable to be within 1h of a venue at most.
Here's the problem in the USA, is that if you do a concert in LA or Vegas, you could be over an hour away and need to pay $30-40 in taxis to find an affordable and available hotel and get to the venue.
Someplace like Boston and NYC are better, but have a host of issues, are expensive, already have issues with accommodations availability, and don't have many venues that fit that niche size without being a stadium. It's tricky to manage.