Even with high enough level,- the advs are a slaughter of troops and far to exepensive to play.
The price on any adv that has been in guild shop so far and for this one is so high that I would never use Guild coins that way.
We van collect 88 each day if we are in a very active guild: Most will be lucky to get this amount in 3 days - and that is 900- 2700 in a month or 2700 - 8100 in the time we have before we get new items in shop. I woulkd never use over 3000 guild coins on an adventure - that is more than half of the coins I can collect in 3 month.