Financing for a lake property to buy out other party

[Rob Ross]

Hello BP,

I am half owner of a lake property in 
Mason County, Washington. The other owner wants to sell his interest in the property. The property has a 500 sq. ft. garage, septic system, power, but no running water. Water is pumped from the lake to the toilet that's located in an outhouse.

I am wondering where do I find financing to buy-out the other party? What I'm finding out is a traditional fanny mae loan isn't possible because there isn't a house on the property.

Please tell me all of your great ideas. Thanks in advance!