As others have said, no gated communities. As a fellow light sleeper (and insomniac), the better investment would be allocating funds toward insulating the house and potentially installing high-grade windows. The city isn't particularly loud in most neighborhoods compared to other cities, but a lot of the houses, including new builds, have shitty insulation that allows you to hear everything and leads to higher heating prices. Decent-sized yard + good insulation and you'll be fine.