Hi,
There are no hidden costs when using points to stay at a DVC resort. There is no tax on the room. Maid service is scheduled on given days during your stay, if you want daily maid service then there is an extra charge for that. I ran your dates thru the points calculator and came up with 344 points - but make sure someone checks with member services for the point total as I've had the calculator be off a bit on one occasion. Happy planning!
Charlotte