If it took three months to build with five people... then let it take three months to destroy with five people. Etc etc etc.
Seriously don't complain after just 3 days... That base took a while and alot of people to get to where it is. If you're hell bent on destroying it, put in as much time as the builders did and ARE to maintaining it.
After 3 days? We've been constantly sieging it for almost 2 weeks! :| And no, thats how it always is dude, destroying something is easier than build. You buy a ship armor and all the stuff, which takes you quite a while, but than a battleship simply destroys you in seconds. Thats how it is everywhere, building and repairing is always a hard part, but destroying something is easy.
Build a house in a year.
Use a bomb to destroy it in minutes.
It's always easier to destroy.
Whoof !
Another thread like mine
The problem is, your 10 BS might be not enough for the base, you would need even more fire power to destroy the base quickly, if you wait for the base resources to be finished then it will take 60 hours to destroy the base.
Choice is yours.
Now you ask "Where to get more than 10 BS ?"
lolwuts strike ?