Talk:Wonder Challenge/@comment-31.78.87.141-20120701181134/@comment-5199526-20120701200122

Look for other things that create coins over time like Totems and the giant emerald, ruby etc. I bought a few of each of the higher ones. Not sure what you're able to buy yet since I'm on level 50 and can get everything.

I made an excel chart to compare the time vs payout to find the best items to have for earning coins.

Here are a bunch of things that make good coins. Giant Topaz, Round Street Lamp, Large Playground, Grand Piano, Sitting Garden, Golden Eagle, Ancient Pillar, Aquaduct, Giant Diamond, Playground, Cottages - 3/4 people, Bright Street Lamp, Giant Aquamarine, Volcano, Great Lighthouse, Lake, Giant Amethyst, Totem, Super Playground, Giant Sapphire, Water Fountain, Hanging Gardens, Giant Ruby, Giant Emerald,

These are the best for XP: Garden, Giant Fly Trap, Howling Cave, Windmill

You can go to the stores page in the Wiki to find out which stores would be best for you at this point.

Personally I wanted more variety in my village so I didn't buy a lot of 1 thing just for points. I have collected 1 of most stores and have 4 of the ones that have been needed for challenges. I put 3 into inventory once the challenge is done in case a future challenge needs more.