i live in silverlake and have had great success brewing ipa, pale ales and porters with city water. i carbon filter and that's about it. though i have been playing around with bru n water and am seeing a little gypsum may improve things, but i'm not super worried about having perfect water.
also, last summer, to combat high temps, i made a basic cooler out of 4x8 sheets of sheathing i got at home depot. i made the box big enough to fit two 5 gallon buckets and used frozen bottles of water to hold temps. i just bought a chest freezer and super happy i did.
welcome and brew on!