You can run Mode32 on a system as low as 6.04. As for the three machines I say fix them all. Recap both SE/30s and replace the weak parts on all three analog boards. True that the SE is weaker than the SE/30 because it's a 68K and not a '030, it still has its usefulness.
I tend to set my machines to do specifics task until completed while I go to another machine and do work on that as well. An example of this was when I was with BizInfoPlus in 2000 - 2008 (a now long-since-dead business to business search engine), where I has up to 10 Macs (G4s & G5s) index segments the known internet to filter out for its search engine database, another to stitch the database together from the indexed files and one more Mac for other things I was doing including monitoring all the machines.
Networking the older machines is not that hard to do, but items might be difficult to acquire. The cheaper option is to get "Phone-Net" modules and some phone lines to string the machines together. The more expensive option is to get Apple's LocalTalk modules and wiring.
For what ever reason you do not want the SE, you can fix it up and clean it and then sell it. It will fetch you a pretty penny, especially in the UK/Europe where things are higher priced.
I tend to set my machines to do specifics task until completed while I go to another machine and do work on that as well. An example of this was when I was with BizInfoPlus in 2000 - 2008 (a now long-since-dead business to business search engine), where I has up to 10 Macs (G4s & G5s) index segments the known internet to filter out for its search engine database, another to stitch the database together from the indexed files and one more Mac for other things I was doing including monitoring all the machines.
Networking the older machines is not that hard to do, but items might be difficult to acquire. The cheaper option is to get "Phone-Net" modules and some phone lines to string the machines together. The more expensive option is to get Apple's LocalTalk modules and wiring.
For what ever reason you do not want the SE, you can fix it up and clean it and then sell it. It will fetch you a pretty penny, especially in the UK/Europe where things are higher priced.