My friend in Rockville has one of those big steel tanks used for home heating oil outside of his home (500 gallon maybe?). Biodiesel has a very high flashpoint, so it's very safe to store at home (like having a tank of peanut oil basically). He uses a hand pump to get it into his car... very simple and efficient setup. I think the minimum amount you can have delivered is 300 gallons. I was thinking of putting one like this in my garage. Only $75!
http://cgi.ebay.com/Make-Bio-Diesel-in-this-300-Gallon-Tank-Container_W0QQitemZ270168063735QQihZ017QQcategoryZ46547QQrdZ1QQssPageNameZWD1VQQ_trksidZp1638.m118.l 1247QQcmdZViewItem
I figure with a 300 gallon tank, I would only need a delivery every 3-4 months. Now, I just need to find a distributor that will deliver to my area!