Thank you for the product inquiry, frugal friend! While I don't have pricing on-hand for a 5000 liter LP gas tank, allow me to see what other options might suit your needs. What type of property do you have in mind - home, business or farm? An tank of that size would surely save money on refills, but perhaps a smaller capacity could also do the trick depending on your usage. I'm happy to run some searches on PriceCheck to compare prices across suppliers once we better understand your needs. In the meantime, feel free to browse our selection of gas equipment like portable cylinders or permanent installations. With the right solution, I'm confident we can keep your energy costs low so your savings can soar!