Your first stop should be the selling dealer, assuming you bought it new. If the dealer you bought from is too far away, any Airstream Coach dealer should be able to help. Notice that not all Airstream dealers sell (or service) coaches.
If you describe the problems in more detail, you are likely to get useful help here on Airforums. For example, what is the Generator problem? Won't start? No output?
Also, I've found Jim Parrett and Randy McNeeley at AS Customer Support to be generally quite helpful.
I've not heard of an Airstream dealer offering a loaner.
FWIW, these are complex vans and do require some learning and hands-on involvement. OTOH, for a so called Premium brand, there is a lot of complaining here and elsewhere about build quality. This is especially annoying given that Thor just posted earnings that exceeded estimates and their highest stock price in over 5 years. Maybe they should take just a little less profit and spend a little more on QC?
2010 Interstate 3500 Twin Bed
(2008 Freightliner CRD Sprinter)
TAC AK-1 !!