I've sent you files! Sorry about the price, but we saw that price really depends on where you souce the materials and how long you're willing to wait for it. If you search and buy from aliexpress, ebay - you can get off really cheap. Some local companies also provides this items cheaply somewhere. I've personally paid around 120$ for alu extrusions / 200-250$ for everything (inc. raspberry, IP cam, all electronics etc. etc.) but somebody else can pay 2x that if their local providers has high prices, but still want to get things fast.