I think there should be a cash trade for chunkloaders because cash is also something that can be purchased from the store and its also obtainable through player trading and voting. It may have to be a pricey item to buy but that way it would only be for players with more playtime and more resources to put towards it.
But on a side note, my base has gotten to the point that when I'm autocrafting stuff with my ME I have to go around and load the chunks to different things such as blood alters, alloy furnaces, pressure chambers, etc. as they are being used in the crafting recipe which sucks a great deal and I did not plan all my builds based on where it layed in the chunk, so most require multiple chunkloaders. Nevermind trying to load a farm or a Laser/Quantum Quarry on top of that for ores...