At least $582.00 dollars for the 5 sheets of galvanized panels alone. Shipping not included in that--and it will be a bunch, at least 50 dollars. You can't get these sheets at homederpo or lowes or tractorsupply. You may find it at a local contractor-hardware store for building real things vs inside house projects.

Metalsdepo has them for 120 each, and stainless is more expensive (http://www.metalsdepot.com/catalog_search.php?sear.... Since this instructable has you coat with primer and some rustoleum type paint, one might consider going with the regular steel sheets and save 115 dollars.

Rustoleum to cover that amount will be another 30-80 in paint depending on the options.

Tamper is best bought at a harborfrieght for 20 dollars because it's a flat dumb piece of steel on a stick. Same with all the other tools except for the drill bits. Assuming you are tackling this project, it may be best to invest in good solid (diablo, bosch, etc) drill bits, but every other tool in this instructable like brushes, one should try to acquire them as cheaply as one can and toss them if they can't be cleaned.

For the shovel and pick, again harborfreight. For the pick, dont' get a pickaxe, get a mattock pick with fiberglass handle $22. This is a great piece of tool for cutting roots and absolutely destroying rocks or prying them out. Mattock end is much more useful than shovel for clearing the tank foundation.