All you need to be able to make a boot disk is a Mac that can write 800k floppies (you can even use a 1.44 MB floppy with the hole taped over if you have no way of getting any 800k/720k (they are the same) disks, though that shouldn't be used long-term as it's bad for the disk) and one of the boot disks from the web, Apple themselves even have some available.
Getting a Plus online would be hard as it has no built-in ethernet, you'd need one of those SCSI-to-ethernet adapters that seem to be hard to find and expensive if you do find one. You don't need to do much setting up if you use the built-in ethernet on the later models, just select DHCP from the TCP/IP control panel (you'll need Open Transport installed) and off you go!
I'd use my 9-year-old Mac, but somehow I don't think that would be very popular!
Especially given that I would probably enjoy using it more than I do using Vista every day, I really love using OS X.