Hmm. I'm getting a message saying I can't build in others' countries until I have 6 corporations and have been playing 42 days. I have 12 corps, but I see in my Gold Coin transactions that I only registered on July 16. (It feels longer than that.)
I guess I'll have to wait a couple of weeks to start building up my enterprise. I just hope it's not 42 days from when I formed Tredroy Trading. That wasn't until July 30.
As for bidding on existing corps in other players' countries, I've done it a few times, but the $50B surcharge means I can't keep doing it forever. OTOH, what's the setup cost in a new corp? Is it even more?
Maybe I should buy more in C3s, but when I look, it seems there's one corp with high salaries that keeps all the available professionals.