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There are very few fees associated with a cash purchase, but you will want the services of a good real estate attorney. I can't give you your costs because we don't know where your are located and each state has their own fees assocatiated with the transfer of real property. The very best place to get a quote is from the attorney or title co that will handle the transfer. You can negotiate who pays these fees. Costs you may incur include:
You have a choice for a survey when you pay cash. It is an extremely good idea to get one so that your title insurance has fewer exclusions -it benefits you in the long run.
Definitely follow the above advice and find yourself a real estate attorney or closing company. Even if you are buying from family. IIRC there are also mineral rights to take into account up there. Pay for a survey as well. My FIL bought a property in Olean and it turned into a bit of a nightmare. Hope it works out for you.