Forums tend to attract people who like to think because they have some knowledge of a subject, it makes them superior to the average person in the street who likes, but is not as knowledgeable (and probably doesn't isn't that bothered). Though that's not to say everyone on every forum thinks that way.
Though, to be fair, if you've got room for another tap and gas bottle and a keg, if your wife can get through a keg in three months (I believe that's the shelf life once 'tapped'), you could save youself some money.
On the other hand, if you'd rather not go to the effort and/or be the one who has to clean the lines and the tap, I'll keep quiet!