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The only company I've been able to find that is lending on land these days is my local Ag Farm Credit, they are part of the nationwide Farm Credit System. They lend for farms, rural investment property, recreational land use, etc. Their current terms are a minimum of 20% down payment at 15 or 20 years and the rates are in the neighborhood of 6.25%.
Don't let anyone tell you "no one is lending on land" because they will help. Just do a search on the web for Ag credit in your area.