So far I've seen a few level 3 recipes, all of which cost 100 energy and 800 crowns to run. And, one level 2 recipe, which uses 50 energy and 400 crowns.
So, with that progression, level 1 recipes would be 25 and 200, and level 0 recipes would be 12 and 100.
I'd like to see some beginning, low-level recipes like that sold in Haven. The low-end equipment that new players might spend 200 crowns to upgrade to a basic item might be 100 for a recipe, and 12/100 to run it. You'd still get your 200 crown worth of upgrade, but you might also get a special ability on it. (And I don't know enough to know what would make the level 1 recipes; someone else can made that suggestion).
These low level recipes would require drops, but nothing hard to find -- the stuff you'd expect to see in the fixed haven dungeon (firefly, I think it was).
If the random bonuses carried over when items are upgraded, I could see this being a commonly used feature.