For perspective, for a 3 day stay it would be at least $1200 for our family of four, minimum, and once that's converted to Canadian funds it's $1500+. Quite honestly, no way do I see this being what actually happens. They'd be shooting themselves in the foot - not many of their normal (not DISboard) guests can or will pay that. And after having "free" FP+ for many years, it's going to create a lot of negative press.
Your free fast passes are not really free. Think about the current system. If you stay on site you get early booking for those "free "passes. You are limited to 3 a day forcing you to think your vacation needs to be longer to get even one fast pass for a popular or new attraction. So Disney has programmed you to believe you need to stay in their hotel, and for more days to get the most out of your free fast passes.
I would much prefer to stay at a hotel off site for a couple days and pay for a fast pass. Everything Disney does is to keep you in their Disney bubble and spending money at their hotels and theme parks.