I highly recommend a "Royal" vinyl shed. The one I built was 8 X 10 and of a very high quality. You can get it for around $800 at Lowes or Home Depot. It comes with double doors, unpainted, but no window. They do sell a window kit for about $100, but you can probably do cheaper than that. It doesn't come with a floor, so you need a wood or concrete foundation. So add $200 for wood and maybe the same for concrete. Check out their website. It goes together VERY easily and can be taken apart in probably an hour by one person, but is very sturdy and doesn't need paint.