minecraft plugin

I wanna clarify that I'm not an expert, I don't know if it is possible to do this or if any of it makes sense , or how hard it is. I'm not willing to pay more that 30 euros or something along those lines for this. This is what I want... you tell me what you can do for the price, or if we can agree on something. Anyways I need this plugin to work with Spigot 1.12 I need three machines that complete individual tasks separately. Each machine is built with certain materials, the materials used to build the machine define it's level. The higher the level the more the machine will be optimized, there is a permission for each machine level Each machine is activated by sign, if the player who placed it has the permission, and is in the correct world. I want it so the machines work when ever the chunkes their in are loaded. Don't want them to glitch or stop working. maybe save the location of the machines something like this: [World] [location] [machinetype] [machinelevel] The three machines I want are: A miner, a compactor, and a sifter, I have taken inspiration from a mod, and by other plugins I've seen on other servers. I don't have any time restrains, take as long as you need. Sorry for my english. Look at the pdf for more information about each individual machine. Everything in here is just for inspiration, in the end you do you, like I said I am no expert or I would have made this myself.