I'm not sure Doove vends at conventions directly.
There's two pretty dangerous corners in furry I've defined and he's running straight into both of them: First, I call 'No Fandom for Old Men'. Furry has always been pretty youth-oriented (people often 'get out' around 30), and the 'scene' has been in a slide away from the Sci-Fi based structure of old and into... Whatever the hell it's becoming. So guys Doove's age are in a weird place: Few peers and a world around them that's changing out of recognition.
The other is the concept of bought social status. A lot of people either go full art whore or spend a bunch of money 'providing services to the community', and overextend themselves. These people are left in the lurch when the cash runs out and they find that all those people that flocked around them when they were a money/studio space/equipment dispenser just *disappear* when the gravy train stops. Doove's extensive 'book illustration' budget expenditure might well qualify there.