I would have said seasonal problems had the biggest impact, because it directly affects planning and implementation.
Maintaining certain unusual architectural features, on those courses that have them, would go hand in glove with membership, if those features weren't understood or appreciated.
But then, when it comes to growing grass, everyone knows more than the super, don't they?
By budget and operating capital, I would think the biggest challenge would be if they had too much money - I can't imagine a club that values its course undercutting in that area?