Originally Posted by
KevinW07
Yes, the "Breeding Roost" (which is what it is called rather than "Breeding Den") when you purchase it becomes a permanent building on your island. You can put it into storage however (at least mine can be). It is only good for 7 days and then when you want to have a second breeding station on your island, you have to activate it again at the normal price of 100 gold (or 50 on sale). I generally don't activate it for any one single event, but have been optimising its use to make the game easier (and more fun) to play when simultaneous events are on (such as Leaderboard and Bingo, or Tales and Bingo, or World Event and Bingo). That way I can justify (at least to myself) the 100 gold as it really helps to win Bingo (via twice the chance to be successful with the breeding tasks, speeding up the time to complete Bingo cards, etc.) and things like collecting enough points for World Events / Leaderboard, etc. In fact, I activated my Breeding Roost on the previous two World Events and easily bred the target dragon for bonus points (and saving the gold required to purchase them, i.e. 400 gold on sale), so well worth the activation cost.
Unfortunately, this strategy won't work with those without GPDs unless they purchase gold with real money. I saved pretty much all my gold when I started the game and purchased my first GPD when it when one was offered on sale and proceeded thereafter to leverage it (and subsequent others) to purchase the rest of the GPDs which now total 12; and hence now reaping the benefits to make game playing easier and more fun.