I might be able to help! If you're looking to build an FC v1.0 (the old documentation and images that have circulated for a while as opposed to the version released in November), I ended up actually making a spreadsheet of the costs I've accumulated. Checking back on it now, I spent almost $2,000 exactly on everything. This includes a second raspberry pi (the 3 didn't work at the time), as well as a soldering iron, holesaw and replacement pump+SD card. Since I'm in the U.S. I bought as much of my equipment as possible through Amazon (luckily I have prime) and the online stores mentioned in the original BOM (including some of the bolts, since Home Depot doesn't stock them), then got the rest at home depot, and was all set. I already had tools accumulated from family and friends (circular saw, drills, bits, screwdrivers, ect.), so I fortunately didn't need to spend anything for those.