I actually don’t use my mixer for chapati or roti. Just mix the water and flour in a bowl, knead just for a couple minutes, rest, form balls, and roll. I like dosas too.
I know what you mean about taking on a new cuisine, it can get out of control having all the ingredients for everything. I keep having to find more room to store stuff. I have been working on my Chinese cooking the last couple of years and I still don’t have all the ingredients I would like to keep on hand.