Ok guys, so i'm building a "roughing it" kinda lot. I've made "tents" out of the A frame roof with doors and everything. They all work fine. I want to make the others like "apartments" so i boxed in the center of them with the door, put in the hidden marker and when i go to assign the door to NCP it doesn't show that option... what do you think i'm doing wrong? or do you think i should play it a while to see if anyone moves in? here are some screen shots.

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IIt just gives the options - Lock-Set as front door- Add the ability to add triggers- Clone- Delete- Reset-  I've tried resetting and all but it just never gives me the option to set it as an NCP door. in game the lil rooms are black so the marker is working. Any advice would be appreciated! thanks guys