If your question is a "if I do this minor variation to your directions will it still work?" type, chances are I won't answer because I have never have tried this specific variation and my answer is that you should try and see what happens. If it works post a video response about it.
I don't know answers to location specific questions unless that location is Boston or NYC. So, no I don't know if *place selling hair online* ships to *your country* you should ask them, not me. And no I don't know where to buy it in *where you live*. The best advice I can give if you don't want to go online to buy it is look in a beauty supply store.
I have no way of knowing how many dreads a package of kanekalon will make because a "dread" is not a unit of measurement. It depends on how thick they are and how long they are. There's no way for me to answer this question. I also don't know many many dreads it'll take to do a whole head of hair. How dense do you want the dreads to be? How think is your hair? How thick are the dreads? Too many variables.
There have been some language barrier issues with this so I'll clarify. Yes the water is hot. Boiling water is by definition hot.