Someone can host OpenBSD for me ?

If your don't have a good internet access, or if you want to try before setting it up at home, you can rent a server or a virtual host. I've had good experience with :

openbsd.amsterdam

They offer virtual machines. The team help to develop OpenBSD. Mischa is very nice.

vultr

Works very well. It's fast and reliable. A bit more expensive though. (The above link is a refferer link).

Similar setups can be found at ARP Networks:

ARP Networks