This reads as yet another symptom of the US mentality which sees government regulation and taxes as evil, but property rights and contracts as sacrosanct.
It shouldn't be possible to sign a contract that binds you to arbitrary amounts of future fees. When buying a property, you shouldn't be locked into doing whatever maintenance the co-property fancies unless you at least own a voting stake in that co-property. (And even then, only within reasonable limits.)
This is the same mentality that somehow sees student loans with >10% interest rate as anything but a symptom of a disfunctional economy.
At the very least, for cases like these, the government should tell scammers creating those constracts "You're free to put that ink on paper, but we're not going to use our monopoly on legitimate violence to enforce it".