You didn’t need two machines to run BeOS. I ran very smoothly on a Windows PC via dual booting.
BeOS 5 could even be installed on a Windows FAT32 partition alongside Windows (it created a 50MB virtual disk).
At one point in time I had Windows 95, Windows 2000, Linux (possibly Slackware) and BeOS 5 all running on the same single PC.
I was probably younger than you, and on the family computer. Couldn't make what I want and mess with booting back then ! I remember trying the PE edition through windows but couldn't install it.