There's another way to think about this: If the primary use for now is only for exchange, and you need higher TPUs in RCI Weeks, why not buy a good trader somewhere else, and rent what you want to stay in on the East Coast when you want to go there? You wouldn't be locked in to any one resort, so as your wishes change, you could go where you wanted to go. The good trader would still be a good trader. If you later found something on the East Coast that is exactly what you want, you could sell the trader. and buy that.
One resort I can strongly recommend is Imperial of Waikiki in Hawaii. RCI code is 2605. The have several different types of units, but a Palm unit (1br 2ba, sleeps 4) deposited in RCI for Christmas week gets 56 TPU. Waikiki always has more demand than supply, so units tend to exchange well. MF are probably around $1000, so there's that, but if you can get 56 TPU for a deposit, you can reduce your rates a fair amount. A 2 bedroom Hala unit deposited for the same week gets 60 TPU. Even a studio Ohia unit for the same week gets 52 TPU.
Just a thought.
Dave