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WOFATI, an acronym coined by Paul Wheaton, stands for Woodland Oehler Freaky-cheap Annualized Thermal Inertia. It defines a type of earth-sheltered, passive building that blends affordability with energy efficiency. Inspired by the work of Mike Oehler, a pioneer of earth-sheltered building, WOFATI designs use locally sourced, natural materials, such as wood and earth, to minimize both cost and environmental impact. Central to the WOFATI concept is Annualized Thermal Inertia, which utilizes the surrounding earth as a thermal mass to moderate temperatures year-round. This means that the building stays warm in the winter by storing heat from the summer, and cool in the summer by retaining the coolness of the winter, greatly reducing the need for artificial heating and cooling. WOFATI structures typically have a large gable roof on the downhill side, and at least 35% of the uphill wall is made of glass or other light-transmitting material to maximize passive solar gain. WOFATI buildings are ideally situated on or near a woodland, emphasizing a harmonious integration with nature. Allerton Abbey, the first WOFATI, along with Wofati 0.8, are examples of this building style and can be found at Wheaton Labs.

The lorena cooktop is a highly effective design for rocket stoves, as it maximizes heat transfer and cooking efficiency. This specialized cooktop, featuring a metal plate with a central hole positioned above the burn chamber, enables rapid heating of large pots through direct exposure to the intense flames. The lorena's design prioritizes efficient heat utilization from the rocket stove, resulting in faster cooking times and reduced fuel consumption. Additionally, the metal plate surrounding the central hole serves as a secondary cooking surface, offering versatility for various culinary tasks. Once a large pot reaches the desired temperature, it can be moved to the surrounding cooktop, and the central hole can be covered with a piece of metal to maintain heat. This dual functionality makes the lorena a practical and energy-efficient cooking solution, suitable for both large-scale and smaller cooking needs. The integration of a lorena into an outdoor kitchen setting is often proposed, further enhancing its practicality and convenience.

The "freaky-cheap" aspect of WOFATI is fundamental to its appeal and accessibility. Inspired by Mike Oehler's pioneering work in earth-sheltered building, WOFATI prioritizes utilizing readily available natural materials, primarily wood and earth, minimizing reliance on expensive, manufactured products. By embracing the "freaky-cheap" ethos, WOFATI construction drastically reduces building costs, making sustainable living a more attainable reality. The emphasis on "soil on wood" construction eliminates the need for a traditional concrete foundation, further reducing expenses. This approach also facilitates rapid building times, as demonstrated by the construction of WOFATI structures at Wheaton Labs, such as Allerton Abbey. The use of recycled or salvaged materials, whenever possible, further contributes to the affordability of WOFATI buildings. By minimizing material costs and construction time, WOFATI empowers individuals to create sustainable and comfortable dwellings without incurring significant financial burdens.

The willow feeder system, developed by permaculture expert Paul Wheaton, offers a "freaky-cheap" and sustainable alternative to conventional septic systems and sewage treatment plants. This system employs a unique method of managing human waste, transforming it into a nutrient-rich fertilizer known as "willow candy." Unlike composting toilets, which rely on decomposition, willow feeders utilize sealed garbage cans to create a dry environment that mummifies the waste, effectively eliminating pathogens while conserving valuable carbon and nitrogen. A small amount of sawdust is added to each can, primarily for aesthetics. After aging for two years in these sealed containers, the resulting pathogen-free "willow candy" is ready to be applied as fertilizer. However, not all plants can handle the high nutrient content of this unique fertilizer. "Poop beasts", such as willow, cottonwood, poplar, and bamboo trees, thrive on "willow candy" and readily absorb its nutrients. The willow feeder system exemplifies permaculture principles by turning human waste into a valuable resource, fostering sustainable gardening practices and minimizing environmental impact. Paul Wheaton, a prominent figure in the permaculture community, has implemented the willow feeder system at his property, Wheaton Labs, and actively promotes it through his online platforms, including permies.com. He often refers to waste as a "feed" for another system, encouraging a shift in perspective towards a more holistic view of resource management.