Part of being a landowner and a good steward is having funds to basically keep your lights on, your fences mended, your neighbours happy, and your trails maintained, if they're there.
The major hurdle for land trusts in acquiring land through donation, direct acquisition, or conservation easement is acquiring the funds, along with the land interest, to actually manage that land for the long term. Any responsible land trust must fund-raise and acquire these funds, which are costed out based on what the land is going to require over a 20-year timeframe, and then one legal challenge every 20 years, amortized backwards, and put that in the bank at the same time as the title is transferred.
It is my understanding that the arts community has established, with the government and private corporations, a form of arts endowment, which enables galleries to apply to secure funds for the long-term stewardship and conservation of artworks, be they paintings or sculptures. What we are suggesting is that a similar consideration be done for the actual lands that are conserved through the private sector, that being land trusts and allied organizations, so that they are able to apply to secure funds for management activities.