i havent answered... but this is what i'd do
buy a warehouse with a overhead crane
fill it with stock metal
buy all the land around it and expand
create a massive lan center in 1/4th of the area, the rest will be filled with hundreds of thousands of dollars of tools, and then ill lock myself inside, letting all the neighborhood kids come in ofc

(like willy wonka

) and sit around with nothing to do like mythbusters, and just make awesome stuff all day for no reason
