lets talk about wood savings for a minute.
I have a gasser and my family and friends have non-gassers.
THEY; never have to clean, never load more than twice a day (usually once), don't ever worry about wood being too wet, dry, large, small, or species of wood. Just put it in and forget it.
I; split all wood and stack it to dry at least 2 years in advance. Then I restack it into the carport for the actual year I'm going to use it. I have to be picky about only getting oak or locust because even with those species I burn 8-9 CORDS of wood each season. IF I don't clean it on time, It won't gasify because of ash buildup.
So, if you are gathering your own wood, I don't see the advantage of the gasser because of the extra work involved. Not only that, but compared to the other boilers that I am around, I am NOT burning 1/3 tp 1/2 less wood than they are. That being said, there are more efficient gassers than mine. But, there are more efficient standards than my family's too.
If you are buying all of your wood with cash money and it is already split and dry, then Yes, I do see the savings of a gasser.
Hey, 2 cents doesn't buy much anymore.)