If everything is up to date and you can afford it, taking what appears to be a Platinum week could be a nice way for you and your family to get into timesharing, IF you can afford the $1000 a year annual fee and enjoy going to Orlando at least some years.
Some things to consider- can you drive to Orlando? You mention you enjoyed going there; do you want to return frequently? Do you want to/ can you afford to go to other places at this point in your life and, if so, would you enjoy learning about timesharing and the ins and outs of trading? I sense money is tight, but not sure how tight it is. Especially if you could drive there, it could be a wonderful way for you to have a low cost family vacation. The benefit to Marriott timeshares is that you get resort amenities with apartment space, and can save a lot on a vacation with the kitchen facilities. So, there are a lot of pluses to ownership and use.
However, there is an annual obligation to MF's whether or not you use it. IF you reserve a prime week you may be able to rent it, but Orlando has tons of competitive rentals so the rental prices are not great, and I wouldn't take it planning to rent it. I'd only take it if I was planning to use it.
There are other options, like enrolling the weeks in the new DC, etc.. Again, we'd best be able to advise you if we had more specifics as to what the weeks are, were they developer purchases, etc.? For example, they could all be high demand weeks, or two may be "mud" weeks and have little value. If all high demand weeks that can be enrolled in the DC, that may present some interesting options for you, but at the end of the day you have to be able to swing the 3K in annual MF's. If you can't afford that then it doesn't matter that the units are free, even if they are all Platinum (although prime units may have some resale value and be worth selling).