One alternative I have is to replace boiler and hot water heater for oil systems (had that, been hostage to high prices there too). Of course the cost for the new equipment, new tank, and running the new lines would be more than what I bought the Harman for. And even then, at today's price in my town, I would be paying $2 more per million BTU than I currently pay for pellets.
Then I could always put in electric. Only thing attractive about that is I could get rid of all the FHW pipes. But at some of the highest kw/hr costs in the nation (oh look, $61.55/million btu - can you say equal to $700/ton of pellets?), no thanks.
I'm liking the pellet alternative. Of course when I'm 80, it may not still be so attractive to me; trying to stack and move all those bags.