Things have changed a bit because there's now a new siege mechanic which ensures the bases can't be destroyed over one night anymore.
Now, as for the building-and-RP things, these are still a bit restricted, to the respective Governments' convenience. There are more lenient governments than Rheinland, and also more strict factions, such as GMG, which would require very quality RP before allowing a POB to be built in their territory.
I'd advise you to start small and first join one of the player factions that already has (one or more) bases, then work your way from there if you decide to branch out on your own. You can also purchase and already built base to save you the effort of hauling and building everything yourself. They come for sale every now and then, and usually already have a valid license.
