How big a flashrom for a minimal freebsd install?

[Chris T.]

I"m toying with the idea of setting up a mini-itx server so I can move 
the dns and firewall daemons off of the fileserver so I can turn it 
off.  I'm thinking I want to get a flashrom ide adaptor so that I can 
swap setups on the thing by swapping cards.  I don't see myself using 
4GB flash cards for this.  I'd rather get smaller cheaper cards.  How 
big is a minimal freebsd install?

Chris