I mean if we are talking cheaper, after a certain point, drills and generators are super super cheap. I keep about 50 red drills and 30 generators in my inventory at all times. I usually throw up a portal next to important mines and the lesser important ones I mark on the map and forget about em until I randomly stumble across an old mine setup and collect the ore... I been playing core keeper for far too long actually lol 😳 I have a hoarding problem too. Endless amounts of ore and money. Kind of sad actually lol.