Mike Rhino wrote:

...
I like the idea of abandoning ISS in 3 years, but sending enough fuel up
that it can stay up there for at least 10 years.**ISS*may*be*in*the*wrong
orbit to be used as a stepping stone to anyplace.

I dont think US has any current capability to send any fuel to the ISS.
You'd have to come up with one that still allowes RKA and ESA to do their
own reboost and resupply.