I'm gonna try and keep this as constructive and positive, so I will only respond about the stove/stoves I would use myself.
So that really only leaves one stove
Ed T's stove is the only other option that I would suggest. I burned it for several hours and had zero issues (no leaks or warping).
Answering these in order for Ed's stove
2lbs 15 oz's (I think, but almost positive)
No issues
Ti pipe and after you use it a couple times it's not an issue, but the first time will take some doing....non issue really
They both take practice, but the Kifaru is easier for me.
I would say every 15 minutes would be average, but that can vary greatly.
Non issue with Ed's stove.
The only thing to think about between Ed's stove and the Kifaru is fact that one is round and the other square. That means the square is easier to cook off of, but the round will be lighter in weight. Other than that, they are both great stoves.
I had several issues with the other companies stoves and would not suggest buying them at this point.
Let me know if you have other questions, but between Tim and I you should have a good idea now.