What you are suggesting simply wouldn't work, its too complex. As you said you want advice to make it something people would actually want to join. This whole suggestion could be done as a gang, why does there have to be a whitelisted faction for it.
The previous factions on the server have all been similar in the sense its a split of rp and fights, forcing the rp would be the downfall before it even became a faction.
I won't be replying again as I've made my point but at the end of the day the last 3/4 factions worked well for a a solid amount of time until someone who has little t