The two hundred gallons I got is just a starter... I’m in Seattle, depending on the season I could easily get 20 gallons of rainwater a day with a well-placed tarp...
Easy water distiller - a big spaghetti pot with an angel food cake pan (one that has a hole in the middle) that fits snugly into bigger pot.
Put water in the big pot, start to boil make a dome top out of aluminum foil seal well. Water will make steam, steam will hit foil dome and slowly drip down into the angel food cake pan. Pure H2O.