How To Grow Tomatoes In An 18 Gallon Storage Container: Using an 18 gallon or similar storage container to grow you plants may not be as attractive as using a clay or fancy pot but it is by no means ugly. What you sacrifice in the way of the round more attractive containers, you gain back 10 fold in the productivity and health of your tomato and vegetable plants. (Pilarch2 The Rusted Vegetabel Garden)
This is a good article by Weed 'em & Reap Backyard Farming & Health on the costs of small farming. Don't let it scare you - start your #smallfarm!