Get someone in who is now doing 100 or more hours a year and that is bound to lead to friction.
I was in a syndicate with somebody who did that. This might *not* have led to friction, if that person wasn't also completely disinclined to ever lift a finger to help look after the aeroplane - whilst others were putting several weeks a year each into cleaning and maintenance, and giving up time they might have spent flying.
Basically, if you put in as much as you get out, I think you'll be fine in most syndicates. If it's all take, you won't. If it's all give, you'll get pretty peed off yourself. Not being skilled is less of a barrier than you might think, as there are always unskilled tasks that need doing under supervision that help support an aeroplane and keep the bills down.
G