BigDee, rig up and extended run tank like I did for my EU2000. All I did was buy an extra gas cap for the EU, took the vent off, drilled and threaded the cap to accept an OMC fuel line connection and VIOLA, it pulls gas from a 6 gallon boat tank.
I reread your original post and wanting another 30 years out of another little generator. The EU's are expensive but I've had mine going on 9 years now and the only problem I've had is the pull rope broke once and it is a bit of an effort to replace but not bad if you have the manual. I've used this little generator quite a bit and have been rather hard on it. I haul it all around in my utv running electric tools, small air compressors and such plus I haul in and out of my hunting camp every time we go. When there I'll crank it on a Friday afternoon and it doesn't get shut down until sometime sunday when we come home. If you want something dependable and that's going to hold up spend the extra coins and get you an EU series Honda.