No, I don't think it works quite that way. The per-point budget should be based upon what it takes to run the entire facility. Then
DVC simply uses its Developer Guarantee to make the association whole after collecting whatever they can from owners.
Hypothetically, if all of PVB has 7.5M points and the operating costs + reserves + taxes for the DVC component = about $60M, dues are set at $8 per point. The published budget is always based upon what DVC expects to have in circulation in the coming year including new sales. If they base the 2026 PVB budget on 6 million points, the DVC expenses should be a similar percent of the whole...about $48M.
The math is never precise because they could miss sales targets. And dues for new buyers' dues are pro-rated, so someone who purchases in October isn't paying $8 in 2026 dues. But the developer guarantee obligates Disney to pay whatever shortfalls exist.