There's no clear guidance when an answer is supposed to be wikified, and there's no requirement to do so. For long, detailed answers, such as the one you provided, which are more of a list/to-do/tips-and-tricks variety, it might make sense to have them as community wiki.
Some sort of guideline that you can use: if you don't mind other people contributing to your post, make it a wiki. Preferably, such posts would be written more informally without referring to yourself in first person, otherwise it would feel weird -- like putting words in your mouth, so to say. When describing purely personal experience, it's best to leave as it is. Posts edited more than a few times (I think five) by two or more users are automatically converted to wikis, and AFAIK there's no easy way to de-wikify them. It's a one-way street, so think carefully whether the answer should really be a wiki.
One last thing -- wiki answers don't give you reputation. While this might not matter to you much, some extra rep could grant you new privileges on the site, which would allow you to contribute in other ways to it (tag wikis can always use some love, for example), so be a little selfish and keep some of the answers with your name on them. Extremely good and popular answers can also be point of pride to some as well, even if they don't care about the rep game.
