Back on the Market, buyers financing fell through. Are you concerned about rising energy costs...? This 800,000 lb. castle-style residence is built with INSULATED COMPOUND CONCRETE FORMS (ICCF). Engineered for extreme energy efficiency and brute strength, no other building system can rival its fusion of structural stability plus passive heating and cooling to deliver up to 70% HVAC savings. Steel-reinforced, cross-linked monolithic ICCF concrete cores are 10x stronger than wood-framed structures. Non-combustible, sound-absorbing 10 in. thick x 10 ft. tall walls withstand hurricanes, fire, tornadoes, rodents, termites & mold. Topped with corrosion-free aluminum, slate-colored and fully insulated 75-year standing-seam roof, Miami-Dade wind rating compatible. A local General Contractor has already prepared an estimate to finish. Flexible floor plan, customizable for a 4th bedroom, home studio, office or warehouse, theater, wood shop or whatever else your imagination can muster. 85% post-consumer recycled ICCF content helps attain LEADERSHIP IN ENERGY AND ENVIRONMENTAL DESIGN (LEED) Green Building status. Plumbed for 2.5 baths. Oversized 1200-gallon septic installed. 200 ft. well, just add pump for naturally filtered drinking water, rainwater premium bottled quality direct from the ground. Home is 139 ft. above sea level, atop 5.5 high & dry acres. Nestled in a tranquil, very private, and picturesque native Florida upland sandhill forest habitat, with walking trails carved throughout. Gated front entrance on paved road. Includes membership privileges to neighborhood spring-fed Cue Lake for fishing, swimming, boat launch, and pavilion resources. Buyer to perform own due diligence prior to closing. Conveniently located between Gainesville and St. Augustine. No CDD fees.