rentshare: I am sorry, I got a little lost
Here is the possible trade: 2BR Worldmark Red Season Yellowstone exchange (13,500 credits) for the week before Mardi Gras (but not including Mardi Gras Big Day) at Wyndham Belle Maison in New Orleans for either 1 or 2 BR. I think BM's value for 1 BR is 189,000 points plus $756. fees.
Now in baby talk, how do I compare

?
JMHO
It is an exchange, so you have to determine if you like the deal or not. If you think it is acceptable, it is, if you just try to put a value, it will not working as that.
For example, use Brain's example, I could argue that before Wyndham stop the renting method, it is from $5 to $6 per 1K, so I could say it probably is $5.25 per 1K for Wyndham. That gives you a very different ratio.
On the other hand, if you just renting from some Plantimun VIP, they may willing to give you the benefit of discount and upgrade. So you may get 2 Bd like 94.5K if they can get it.
Most of the time, exchange happens between friends, not for commerical.
And some reservation is hard to get then the other. Some maybe hard just for that system, but if you go through other system, you may get easier choice. Some units are much bettter than the other.
You have to make decision if you think you are willing to reserve for someone on the WM side for Yellowstone for 2 BD red season for the price of 1BD at New Orlando before Mardi Gras or not. You may have strong reason to go there at that week, and may know you will not be able to use your 10,000 WM credit anyway.
The point are in the range per usuage wise. The exchange can not get to exact, as long as it is in the range, it can be a possible exchange.
This is probably what I will do, if I want to go that route,
You need to look at your WM credit, and decide
1) what will you do with those credit
2) based on the way you use the credit, what kind of value you think it will bring you (or cost you)
3) what your choose to get the exchange side
4) what is the possiblity and what it cost you
Than you can answer that
So, say you will use the credit for vacation if you can not get the exchange,
So, if you travel to Yellowstone as you think, it cost you the MF of those credit, if you rent the room from the owner, it will cost you the renting credit cost, so the value is the renting credit cost.
Now, you may try to exchange using RCI on any NO resort, it will require you probably 8,000 credit deposit and 164 exchange fee, but it is no guarantee, you make a guess that you probably will get it with 30% of chance that you will get a place you can accept. So if you don't get it, you will have to rent it, and assume you believe it is about $1000 per week, so it is $700 ($1000 * .7) + whatever the exchange route will cost you * .3
Than you get the 2 figures, if they are within tolorance range, or in favor of you (especially if you use your MF as WM credit value) you can consider take it.
Jya-Ning