Tourist - sure, why not?
She paid $20 million out of her own pocket for her trip - sounds like a tourist
to me. An obviously overly rich one with a currently unusual destination, but
a tourist just the same.
Besides, it's not meant to be derogatory. I think a lot of us here would tolerate
that title easily to visit space in person. Somebody loan me $20 mil and I will be
glad to prove it.