Just FYI: recently there were some discussion wether an installation on i386 hardware with 16 MB or less would be possible (and usable) or not. Beeing curious, I just made a release(8) (without X11), and gave it a try with qemu.
Result: you can do a complete install with 12MB RAM, but for running and *using* the installed system (with sshd and ntpd enabled), you need 16 MB. [In theory 13 MB are enough, but then the system starts trashing as soon as a ksh(1) a top(1) are running.] Ciao, Kili