why not just have a slightly harder specific requirement regarding some locations like say the mining fields? use the RP requirement as a means to distinguish the random-weekend-because-we-could-pob's from those that have an actual planned future and Investment, this would (hopefully) make the idea a little more appealing to merchants and traders and possibly generate more RP where there might normally be very little or none at all... all though it might be slightly more of a hassle at the same time.