I’m really interested into this. Aren’t you however omitting the pricing for the soldering tools? I see only the lens, but I imagine you need the thing to actually melt and solder (sorry, don’t know the name). And I guess you need some metal to perform the soldering.
Would love to have suggestions for those too, so I can start myself, I’m really bored about having to spend money for something like this that should be super cheap.