Im currently planning to convert my deep crawlspace (currently 7.5'-3') into a basement (It is/will be walk out on one wall). My house is currently one story and slightly less than 1000 sq. ft. I am planning to move the furnace and water heater to the basement as I wanted to expand my tiny kitchen on the main floor. What will be the greatest challenges and what are the best tips anyone could provide? Please let me know if you need more info... I am also planning on adding an addition onto the back of the house and soon to be basement...So it will be >1000 sq ft. I am aware that I may need to update/resize my furnace.