If i get the towns name im happy. il figure out the rest my self to avoid spoilers if there are some..

Novac

I wonder if Doc Mitchell's house is safe.

The simple thing is find a container put something random in it, save then leave the house wait 72 hours then reenter the house if the item is in there then the container is safe. You might have to fast travel outside of that zone area example if you want to store something in goodsprings just fast travel to primm and wait the 72 hours

Thank you kindly sir *hand you 10 caps*

meet some people and do some quests before you pay...I know it's only 100 caps.

so its confirmed its the 72 hours respawn rate in this game to ?

I think so it would be weird if it wasn't in the game