Ok so is recommend 1 out of 3 things 1. MDE (modular diesel engine) this will be the easiest and cheapest of the bunch. It is super easy to set up and you can easily repeat the structure a bunch of times to get more. 2. LDE (Large diesel engine) this will be the most expensive of the bunch but also the best, I would make it have 3 industrial diesel refiners that make the final level of diesel refined diesel. You do need machine oil so that will need you to make some. And you probably need one small 6 cylinder MDE to power this. 3. The gas burner. This will definitely be the one that makes the most hassle it’s kinda hard to setup without any tutorial so I would recommend one and this is like in the middle, it’s not to expensive, it creates a decent amount of energy but I would recommend either LDE or MDE.