For fees, the way they get billed by Wyndham is those payable to the HOA, which typically include maintenance fees, reserve funds, property tax and local tax, and the program fee, which would be $0.64 per thousand for members with plus partners, $0.62 per thousand for members without plus partners, or $0.72 per thousand for the first million points for presidential reserve owners, then $0.64 per thousand for points over a million. These change every year.
Right now there are a couple of Panama City Beach contracts for sale on eBay; one an annual 84K and the other a biennial 168K. They both show the exact same "maintenance fee," but it doesn't seem to match the standard 2020 costs for PCB that have been reported here of $4.45 per thousand for the HOA plus the program fee, which has a $180 minimum. The HOA cost for those contracts should be the same ($31.15 per month since that is how the seller quoted the "maintenance fees") and if the contracts are currently held by someone that owns other contracts the program fee would be $4.48 per month for a member with plus partners, making the $35.63 per month quoted by the seller. That being said, if you were to buy either of those, the program fee would be at the $180 minimum, or $15 per month, making your cost $46.15 per month if this were your only Wyndham contract; if you own other Wyndham contracts it would work out to $35.49 per month as the plus partners are part of having bought from the developer. The costs will change with the new year, of course.
Housekeeping and transaction credits are associated with the number of points your account gets per year and come with the points. You get one free housekeeping credit per thousand points and one free reservation transaction per 77K points. I don't have experience with needing to track those as I'm VIPG, but believe that housekeeping credits don't get borrowed or PDFed to other years, which might make the biennial contract a better option as 84K isn't much to vacation on. If you'd be using it every other year, it would make much more sense to me to have a biennial contract as the points are only good for one year, so using the off year points would mean you either have to "borrow" the next year's points to use in the current year, which can only be done in the express reservation window (3 months, I believe), or use the points deposit feature to move one year's points to the next, which costs $39.
All things considered, it might be more worthwhile to look into the WorldMark side of Dolphin's Cove, it that is where you want to go. WorldMark credits are good for a year, similar to Wyndham points, but can be used to book a vacation 13 months in advance, making them effectively useable for a 25 month period from when they get into your account. (You can also borrow from a future use year without the 3 month limitation, which could make it a 36 month period if I've got it all right.)