That is definitely the easiest way to run a relay. Here are some reasons it's not a good idea, though. It puts your IP address on a list of public relays. That's something you probably want to avoid, just as I suggest using an alternate email address in the contact info. Most residential internet connections are pretty slow, especially the upload speeds. There are people who run relays from home, but most of them seem to be on Verizon FiOS connections (150 mbit). You'll have to keep the browser bundle running all the time. A relay with frequent downtimes is discouraged, because Tor clients downloads the list of relays at different times. Many will try to connect to your relay while it is down, so that adds to the inefficiency in the network. Lastly, if you aren't in South America or Asia, it doesn't add to the diversity of the network.