Don't forget that all you are getting here is access to an exchange system. That's it.... You get to use your week, or convert to DP points - not both. When talking with Marriott salespeople, they will often confound things by blending what you are buying with what you can elect and arguing you paid $6/point or something.... The resale week is already yours and it's paid for. This is just access to another usage option.
Like Flex, any points you buy from Marriott as part of a deal to enroll weeks are pretty worthless on the resale market. You can also buy points on the resale market at $5/point (after the $3 fee to Marriott). So if they charge you ~$35K for 3000 points that you can otherwise buy for $15K and that you can resell for only $5K-$6K that a pretty hefty price to pay just to have access to an exchange system. For comparison, II charges $100/year and a fee per exchange (which would be analogous to the "skim")...
If those 2 big purchases you made presumably also have high rental values, you can potentially save a lot just by renting those out and then using the cash to rent at the Marriott resorts you like.
I'm not saying it's not nice to have enrolled weeks. It is easy and convenient to make exchanges, but at what price? Most of us can recognize an expensive points product when we see it and would refuse to buy into it. The irony is that if the deal was to just pay $1/point for every week they allow you to enroll (say $4000 for WKV 2BR Plat, $8000 for a WKORV 2BR) with no additional purchase I suspect most owners would decline that too, because a comparison to II makes that look expensive (although I personally would like it better). But when the deal is to spend $30K+ and buy a super expensive points product and enroll some weeks as a bonus, for some reason that becomes exciting