Howto: create your own Skyrim harem, aka a house full of ladies
After observing the various game mechanics, I pondered if I could get 3 gals to live with me at once. So I tried out the theory, and it worked. See below for the technique I used:
step 1: decide where you want to live and who you want to be your housecarl. I chose Whiterun because a) I enjoy the city's ambiance as well as the location/convenience, and b) Lydia is, after all, sworn to carry my burdens.
step 2: decide who you want to be your wife. My choice was Jordis from Solitude because she is both pretty to look at and has what seems to be the nicest/most pleasant attitude of all the NPCs in Skyrim.
step 3: decide on your follower. I went with Aela because like Jordis, she's nice to look at (and as a bonus will equip forsworn armor), and does not have aggravating dialog. Plus she's just up the path to re-acquire if I change followers. And of course she also trains you in archery for free, saving you nearly 10K if you hammer thru the sessions when avail.
step 4: get married, do the dialog to have your wife move to the house you picked in step 1. wait 48 hrs and she'll appear in the house along with your housecarl, and if you enter with your follower, you now have 3 ladies to kick it with.
note: You can always swap followers at any time of course, including to your wife or housecarl, but the only way to get all 3 in the house at once is obviously to choose one that is neither of those.
note: if you are quick changing followers in the house, you can get all 3 to equip almost whatever gear you want - but as soon as you leave the house and return, your housecarl and wife will both put the better gear into their inventories rather than equip it.
here's a screenshot of mine: