25 in a wasteland
16 in 2 and 1/2 power plant (even less, if you do not make a large storage space and room for exercise)
6 in nuka cola factory
6 in Medbay (since I do not need RadAway, they can be transferred to Science lab if necessary)
Radio station is not required. I do not need new residents, as well as happiness on 100%
This is all under the assumption that all dwellers developed to the maximum and have 5+ suit
Your opinion?