You may tell him this - regardless - it comes with a very BIG BUT!
We bought in to DVC 3 years ago. Our cost was about $77 a point. We bought 150 points. Today, those points are fetching anywhere from $90 to $94 a point in resale. Since we have joined we have paid about $2000 in dues.
The Net:
Cost: $11550 Purchase Cost + $2000 Dues = $13550
Present Value (150 Pts X $90) = $13500
So, for $50 we have had 4 WDW vacations!
The BIG BUT is obvious - we have been more then lucky! DVC is not an investment and you cannot be assured of having the same good fortune as we have. If you were to buy in today (via DVC or resale) you will most likely not be as lucky!
Ours was good timing and good fortune that BCV has become as popular as it has. Keep in mind - if they announced tomorrow the Resort at Contemporary people may be selling BCV contracts by the 1000's to buy in to the new resort - you never know!
As anyone on these boards will tell you immediately - DVC is not a financial investment. Rather, it is a vacation investment! But, most of the resorts have increased in value over time. All DVC members have been blessed that this is not like a traditional timeshare that plummets in value the second after the ink is dry!
Also keep in mind that you are not required to go to WDW every year! Rather, you may opt to rent your points to another member, a friend or someone advertising on this board! The income from renting your points out should easily cover your dues for 2+ years.
What I recommend is:

Do a ton of research. Spend lots of time pouring through these boards (these boards are the best possible resource on everything DVC). A post like yours is not uncommon! Look at the decision making process others went through.

Post questions and send PM's to other members of the board. The amount of DVC knowledge lurking here is unbelievable! Everyone on the board is passionate about Disney and DVC. And they are always willing to help! They are your greatest ally!

Most importantly - forget all the financial aspects I told you and choose the resort you feel is right for you! I am somewhat confident in saying that baring a disaster or economic collapse - you will not lose your shirt on this investment!

Lastly, tell your husband that me and about everyone else on this board have one regret regarding our DVC purchase: We did not buy sooner!
Good luck and please report back and let us know how it go's!