Many potential buyers do not like the prospects of hauling water and think that it is much more expensive. A few buyers unfamiliar with anything other than public water systems think that a cistern is something unsanitary and are unaware of today's modern cisterns. I suggest that in your marketing point out that for a small fee ( you might even quote the fee) , there are water companies that will deliver water to your modern sanitary cistern that usually only needs refilling once or twice a month ( depending on useage and cistern size).
Having a cistern does make it a lot tougher sell...I have a lot of buyers that are not willing to have a cistern when they are looking at properties (especially with that many acres). Is there any opportunities for a well to be put in? If so, you can market that for potential buyers. If not, letting buyers know how much you spend on water and how often you fill also helps. Sometimes the cost is less than what people think it might be.