Although you will find the response to be overwhelmingly positive about DVC on this board, at the same time people will be very frank about the fact that for those whose vacation habits don't fit the profile of the average DVCer, DVC is not a great choice.
The closest comparison to a regular hotel room is a studio at DVC, however a studio will do nothing to alleviate the problem of you needing 3 separate beds. For you to REALLY appreciate DVC, you would need to get a 2 bedroom unit, in which you'd have 2 baths, a queen sized bed for each of your kids and a spacious master suite with king bed and jacuzzi for yourselves. No matter WHAT you do, this is going to be more expensive than a single room anywhere (not counting suites).
Here is some math using a 2 bedroom:
Say you buy 265 points to allow you a week in a 2 bedroom in dream season every year (dream is the mid-range season) at SSR. At $79/point that would be almost $21,000. For a 50 year contract it would cost you $1.58/point/year for that contract. Add dues to that at $3.80 and your points are costing you $5.38/point/year. A week in a 2 bedroom at SSR would cost you $1425.70. The same week in an AK room would cost you $1,160 for the week if you get a discounted rate. So for less than $300, you can have the luxury of a 2 bedroom vs. cramming everyone into one room. If you compare "apples to apples" in terms of beds and bathrooms, you would really need TWO AKL rooms, so you're comparing paying $2314 for two rooms vs. $1425 for the 2 bedroom.
The thing you have to decide, however, is if it's overkill. If you truly only use the room to shower and sleep and you don't feel like you're on top of each other with the rollaway situation, then bottom line you would be paying more for a 2 bedroom when you really don't care. DVC's do NOT have a rollaway bed option and because of the addition of the kitchenette, there is not too much space for an air mattress in a studio. You could probably fit pretty comfortably in a 1 bedroom at OKW for fewer points and for lower dues and a smaller price to buy in with a resale with 4 people.
My point is that if luxury home away from home accommodations are important to you, DVC is the way to get them for a reasonable price. If you don't really care, you will pay more for dvc than for "the basics". It's kind of like having a coupon for 20% off a $200 purchase. If you were going to spend $200 ANYWAY, great, you will save $40. If you weren't going to spend $200 anyway, it's kind of silly to spend $200 to save $40.
Lisa