This is my 3rd completed vault, but the 1st I am really proud of and very happy with.
First mod on Nexus, so please be easy.

It aims for coolness, easy & quick access to essential vendors and workshops .
Offering enough room, power, food and water so you can focus on exploring the commonwealth wastelands. (once you put/built everything)

My lore for the vault its existence:
A Vault-Tec high-ranked manager was a neigbhour of mine at Sanctuary, and also 'hosting'  the entrance for the Vault-Tec worker vault, where they wanted to reside in, until we were no longer frozen after the fallout.
You know, the ones that gave the guards in Vault 111 the orders.
Things went bad, and to 'my' (character's) luck, upon 'scraping' the remains of a house, we find said entrance to the fully intact vault, free for our convienience...

Mods required:
Build your own vault : http://www.nexusmods.com/fallout4/mods/10603/?
Transfer Settlement : http://www.nexusmods.com/fallout4/mods/22442/?
Settlement Objects Expansion : http://www.nexusmods.com/fallout4/mods/10075/?

NOTE:
I do not know how or if the blueprint could be directly installed.
Until then, please use the manual method.