I bought AUL more for location as well, and likewise, thought long-term I would use it more. If you truly use it, the resort fees will likely be a drop in the bucket compared to what it would cost to just rent a regular room there since their room prices tend to be on average higher than the regular deluxe or
DVC WDW rooms.
A couple of years ago my wife and I stayed for 2 nights, and it cost us over $1000 dollars for those two nights in a standard hotel room. We loved it, but it's really hard to justify paying that kind of money long term.
When we went on a
Disney Cruise and they offered some decent discounts on Aulani, we pulled the trigger and then bought more points resale.
This coming May, we are staying in a 1 bedroom Villa for 7 nights using our 2019 use year of points without borrowing. The cash rate for my days of travel for a 1 bedroom villa is $934 a night (a regular standard view hotel room is running $604). With taxes, the room for 1 week would cost me $7516.25 if I paid cash. If I were to just get a standard room it would be $4860.59. My 2019 annual fees are going to cost me about $2000. In any scenario I'm going saving a lot. Next year it's about $5500. I paid about $35k for my points in cash, so if the difference in my dues and room cost continues to be about $5000 a year (since room prices and dues both tend to go up), It'll only be 6-7 years before I break even on the investment, and I'm still left with decades of ridiculously cheap rooms compared to retail rate. Not to mention, the money I used to pay for it up front has been long forgotten, so for the most part it just feels like I'm saving a fortune on my vacations and I see all the other folks checking in at the retail rate as suckers.
In terms of the 7 month restriction, room type and travel months matter. If you rent a 1 bedroom more often, you have more choices. Studios are harder to get on shorter notice, but even then if you have travel flexibility, it's not too bad yet. I booked a couple of impromptu studio nights at Grand Californian recently within the 7 month window, and that's a place that's really hard to get. Just have to stay aggressive and monitor regularly.