Investment Property and Equipment (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Summary of accumulated depreciation by major classes of assets
Total Accumulated Depreciation	$ 84,655,017	$ 73,270,257
Site and Land Improvements [Member]
Summary of accumulated depreciation by major classes of assets
Total Accumulated Depreciation	64,292,239	56,262,656
Buildings and Improvements [Member]
Summary of accumulated depreciation by major classes of assets
Total Accumulated Depreciation	3,036,082	2,685,623
Rental Homes and Accessories [Member]
Summary of accumulated depreciation by major classes of assets
Total Accumulated Depreciation	9,107,422	6,710,323
Equipment and Vehicles [Member]
Summary of accumulated depreciation by major classes of assets
Total Accumulated Depreciation	$ 8,219,274	$ 7,611,655