so im looking at the WL and it says 37pts for sun-thurs and fri-sat 47 pts
could we just buy 50pts and stay sun-thurs?
The good thing about points is that you can use them in any fashion that you want. So, if you want to avoid weekends, you can. If you want to go a few nights only, you can.
Just be aware that total points for a resort are fixed and can not change. However, the points for each night, for different room types, and the seasons a time period is in can all be adjusted to ensure that balance is happening in terms of bookings. If something goes up, however, something else will go down.
I say this only so that you are aware and take this into consideration when deciding what to purchase. We currently travel in Magic Season which is a higher point time. It works out for us because at some point, when we retire, we will travel to Disney during what hopefully, will still be lower point times--meaning our points will go farther down the road.
You may want to consider looking at other seasons, just so you have an idea of what you will be able to do if you travel outside the January time frame.
Good luck!