Enclosed patios can be a budget-friendly way to extend your living space while enjoying the outdoors. Consider using inexpensive materials like treated lumber, corrugated metal roofing, and vinyl windows for the structure. Vinyl or wood screen doors provide ventilation and natural light. For insulation, use foam board or reflective bubble wrap. Pergolas and sunrooms offer partial coverage, while gazebos and screen porches provide full enclosure. Consult with builders or contractors for professional assistance. Explore suppliers like hardware stores, home improvement centers, and online retailers for materials and services.