You will have plenty of time to do research before Reflections is for sale.
DVC can be a great way to do Disney.
Through banking and borrowing you could make every two years work with a smaller amount of points, but there are some risks.
Let's say you will need 180 points for your desired vacation in the time of year you are most likely to travel. So you buy 200 points. (This is because it is good to have a cushion if 1) you need to stay an extra day, 2) if you need to switch your plans to a larger unit but with fewer days, 3) if all that is available is a more expensive view, etc. )
So you buy your 100 points in 2020. (To make this simpler, I will leave out the subject of Use Year, but you should read up on it before buying at Reflections or anywhere else). So you can bank your 100 points into 2021. In 2021, you have 200 points available to use for your vacation. Lets say you need 180. so you use the 100 banked points and 80 of your 2021 points. So you have 20 points left over that you can bank into 2022. But wait, you are not going to go again until 2023, so you will lose those 20 points. Not good! Let's start over.
OK, starting over! You buy 100 points in 2020. You schedule a vacation in 2020 by borrowing 80 points from 2021. The vacation takes 180 points. So you have 20 points remaining in 2021. You bank these into 2022.
In 2022, you plan a 180 point vacation. You use your 20 points banked from 2021. You use your 100 points from 2022. And your borrow 60 points from 2023. And then you bank the remaining 40 points into 2024.
Ok you start to see that you really have to stay on top of your points so you don't lose any.
The other risk is that you have to cancel your vacation. You can always reschedule the vacation for later in the same year. You could bank any current year points into the following year and come then. But you would risk losing any points that you have banked or borrowed if you cannot reschedule. If you had to cancel your 2020 vacation, and could not reschedule later in 2020, you could lose your 180 points, You might be able to rent them out and recoup some money.
If you had to cancel your 2022 vacation and could not reschedule, you could lose the 20 points banked from 2021 and the 60 points borrowed from 2023. But you could bank the 100 2022 points into 2023.
So if you are in firm control of your vacation time, and have low risk of having to cancel, the every two years approach can work - and many people use it.
By the way, you can see how going every three years would be even more of a risk.
Good luck in your decision.
