Is DVC right for an every other or every 3rd year Disney trip?

[w84no1]

I am thinking about a DVC resale in the next year, but I wanted to know if it would be right for me. We are a family of 5 with a 6th on the way It is me, DW, DS(7), DD(5), DD(just turned 3 Sunday), and DD(Due here in March). We live 12 hours away and drive to Disney when we go.

Pretty much that means I will need at least a two bedroom for every stay from now on. Because of the kids school schedule, our trips would be the full week before Christmas(preferred), the week of Thanksgiving, or maybe late summer(only as a last resort!). This year we stayed December 14 - 23 at Port Orleans Riverside with free dining since my DD was 2 at the time. Now that she is 3 and counts towards room occupancy , our options have changed.

We don't want to go to Disney every year, but maybe every other and sometimes it might even be every 3rd year.

1. Is DVC right for this type of use?
2. How many points would you recommend so that we could get a 2 bedroom for at least 7 nights during those times?
3. Would you consider 2 studios if a 2 bedroom wasn't available?

Thanks for the help!