Powering a ~500w blower is not a big deal if you are flexible with diy options. You can backfeed 50A 240v into your panel with about $150-200 worth of hardware (and to code if you follow a few basic rules). A ton of Houston homeowners did this after Ike. I was able to keep my furnace going continuously through a 24 hour outage with a 12kw generator. I know of some who used even smaller ~2kw units to similar effect (albeit they had to be more conservative with other household loads)