More Gold = Longer Battles

Sometimes I feel like 3 minutes can be a little short for larger bases and golem/giant/healer based armies. I think you should have the option to get battles up to five minutes long. i.e.
TH 10 (cost per search)
1 minute, 650 gold
2 minutes, 800 gold
3 minutes, 1000 gold
4 minutes, 1150 gold
5 minutes, 1400 gold

I think 5 minutes is over kill. Just dump a pekka with 6 to 7 healers behind hear, with a barbarian king an archer queen and completley wreck a base.

I can see where you are going at but maybe the max could be like 4min long and it would have to cost quite a lot