First off, I think you are doing the right thing to find a home for your ferret if you are not happy with it and cannot properly care for it. I am a member of a pretty big ferret forum and would be happy to put up a post for you if you let me know the ferret's age, sex, color, and your general location. The board is private so I cannot give you the address to have you post yourself.
Second, Ferrets are not easy to care for. They are extremely high maintenance pets. I have 6 Ferrets. Ferrets require daily feeding, daily watering, daily socializing, daily cage cleaning, weekly nail trimming, and annual vet visits. If you are not able to provide these things than you are definitely doing the right thing to find him a home. The poop issue is due to poor quality food. If you feed good food they don't poop 10 times a day. If they did then I'd be cleaning up 60 poops a day and I'm not. Not even close. I feed Totally Ferret and Zupreeme. You might want to pick some up while you are waiting for him to get a home so that you can cut down on the poop.
That said, Iguanas need ALL of the above PLUS daily mistings and/or soakings and a much more labor intensive feeding. To feed my ferrets I simply scoop out their food and fill the bowl. To feed an iggy involves alot of chopping and cutting. Plus weekly trips to the grocery store to pick up the food.
I feel that the care requirements timewise and moneywise for Ferrets and Iggys is about the same. Some things Ferrets need more of, some things Iggys need more of.
As for getting another Iggy, I don't see the point in even commenting. You are going to do what you want regardless of what anyone here has to say. So I will bite my tongue on that topic.

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Lyns Lair
Frogwatch USA
WNY Herpetological Society
0.1 Cat (Mia)
4.2 Ferrets (Wolf, Shadow, Verdell, Sullivan, Boo, Peach)
1.0 Carpet Python (Bear)
1.0 Malagasy Blonde Hognose Snake (Wilbur)
1.0 Yellow / Everglades Rat Snake (Pumpkin)
1.0 Russian Sand Boa (Fang)
0.1 Normal Corn Snake (Mysty)
1.0 Anery Corn Snakes (Suezo)
1.0 Banded Water Snake (Ripley)
0.1 Golden Greek Tortoise (Sunshine)
1.0 Green Iguana (Norbert)
1.0 Whites Tree Frog (Trevor)
2.0 Solomon Island Eyelash Frogs (Chompy & Gimli)
1.0 AFT Gecko (Cocoa)
5.5 Leopard Geckos (Trouble, Scooter, Simba, Firenze, Teddy, Mystique, Freckles, Dotty, Zipper, Twister)