Those are all good calculations but it's so mathematical. Vacations are not based on math as much as they are emotion and love.
AKL is best because I realized that I could have more points
More of something that isn't necessarily what I want doesn't sell me.
My parents own DVC at AKL
As
@kboo said, why double up? Get something new so you can vary your experiences.
I absolutely love the MK area resorts
Soooo.... you know where this is going.
You said 150 AK = 120 BLT because the up front cost is the same. But the up front cost is only one component of the overall cost of ownership. For example... AK 150 x $100 = $15,000. BLT 120 x $125 = $15,000. So you're right, they cost about the same up front. But over 40 years... You'll spend $28,400 maintaining the BLT but $40,600 maintaining the AK (before inflation and alternative use of money) $12,200 more!
I could rent out at least 30 points a year for $445
I think you're overstating the value in converting points to $$ and the likelihood that you'll actually do this once you own. For one, AK points don't go for $15. They're the bottom of the barrel on the rental market. Yes I know the mantra out here on the Dis is that it's easy to rent them but it is a pain, it does take work, and if you're overbuying to rent, then you've overbought. I just got an email from a rental place offering me $14 for my BLT points so AK will be less than that!
You're putting all your eggs in one basket. Your parents own AKL... You'll own AKL... You'll get tired of AKL, value rooms, the parking lot view, and bussing to the parks. So different from owning at the GF where being across from the MK and on the monorail will never go out of style... or BLT where you can walk to the MK any time. You love the MK area so... buy there. Stay at the AKL on your parent's points every once in a while.
Between GF and BLT... It's hard to pick. Which resort do you love? Any reason the Poly is not in your selection list?