If you really want to keep it and are dedicated to using it (and if so, that's awesome!) I'd look at getting another cheap-o beige Mac to use as a bridge. Anything will work, really, but the Road Apples are going to be your cheapest bet. I'd even recommend something like an LCII, x200 series Power Mac, etc...just something small and very basic that has easy Ethernet capability. Some sort of external SCSI storage for the Plus should also be quite high on your list - a Zip drive or external hard drive are excellent choices.

Stimkind has a SyQuest 135MB SCSI drive for sale in the classified section that may work well for you, the cartridges are a bit obscure but performance is pretty good. I have one hooked up to one of my SEs and I like it a lot.