I have been doing this for a few months for similar reasons - particularly spinning up family accounts with little additional overhead - but decided to pass in favor of hosted. Getting everything set up was fine enough and my mail was eventually being received in places I expected (I had to add my domain in Google's panel somewhere), but I noticed lag on receiving stuff, and was still occasionally ending up in spam folders. How are you overcoming that? Forwarding stuff off? Do you host in a VPS somewhere?