Why not make a base restricted to gangs with over 100hours... I've been thinking of this for a while make a base where if your wearing a gang tag that has over 100 hours it will say "cannot take base your gang has exceeded the limit of hours" this will help small gangs fight small gangs work themselves up a little get off the ground and later face bigger gangs.
Honestly it's hard staring up a gang when your new this will limit the bigger gangs gaining up on small gangs.just a thought