Originally Posted by
BiTzSam
I have answered that already. What you said is the reason why there are only 3 bases, so they can't make them home bases.
If you have 6 gangs with 10k hours, and 3 of those gangs hold the 3 bases. Do you think the 3 gangs without a base are just going to quit? No. They will get 25 strong members and take one of those bases and then defend it against the attackers.
Even if the 3 bases are in an alliance with each other, they won't be able to help each other out, as each of the 3 bases will be being attacked at the same time, possibly by more than one gang so they will need all their members just to hold their own base.