My husband is an absolute chilli head and loves his tacos so I tried doing this exact thing about a year ago. I just used a recipe on the net but it called for the chillies to be sliced & put in a jar, then a vinegar, sugar n spice mix is boiled up & poured over. I think you needed to wait a few months too. DH loved them, so I guess that means they worked!
As far as the cloudy salt goes I wouldn't worry too much - naturally sourced salt has loads of minerals in it and they make a water n salt mix cloudy (and often with 'bits' at the bottom as well!).
