You can buy tahini already made. Grinding it in a food processor is a bit of a strain on the processor. You can do it, no problem, but if you are doing it alot, it is better go get a commercial nut-seed grinder especially designed for making nut butters.
Unfortunately, I can't find blanched almond butter in the US, only in Europe. So you would have to grind your own if you are in the US. Commercial almond milk is overpriced for watered down almond milk, thickened with caragheenan. It is easy to make your own in a blender. Mix blanched almonds with water, buz for about 3 minutes. If you want you can strain out any tiny nut particles that remain with cheese cloth but I think that is a total waste of time.