A lender will want to know that if you don't service the loan, he will be able to recoup his money by selling the property. A church building is somewhat specialist and there might well be a limited market for it if the lender had to sell. More so with a graveyard attached. Splitting the title might make a difference, but even so, there will be a limited market for a former church, or any building, if it's next to a graveyard.
I don't think that you'll find a 'normal' lender, and any specialist lender will want to make sure that most of the risk is on you, so that if they have to sell the property at a knock-down price to get rid of it, there'll be enough to cover their loan, with you picking up the risk of any shortfall.
Sorry if this discourages you, but good luck with the project.