So all your points are resale and you can't monitor cabins.
Do this--
(1) Go to the "Offers & Benefits" tap on your DVC portal and select "Special Add On Offers"
(2) Select the "Add On Tool." This will open another new page.
(3) By the "Cabins" section, select: "Resort Details"
(4) Then select: "Room and Points." This will bring you to a new page with offers each room category. With the cabins, there's only one room type.
(5) Click "Check Availability." This will bring you to a new page.
(6) Next to the One Bedroom Cabin section, click "Change Search" (This is different than the "Change Search" at the top of the page.)
(7) Put in any dates you like to see availability.
(8) If your search produces a response that says "partial availability in a small font, click on the phrase "partial availability" to see what dates are open.
But with this, you can monitor anything that you can't find access to through resale points.
FYI - I've been monitoring
Disneyland Hotel Villas with this. They are hammered at the seven month window harder than anything other than GCV. I've been monitoring a small number of add-on direct points, looking to see where they'd make the most sense. My opinion: DH probably makes the most sense for me.