>>598868Combination of around 100 player settlement mods
prefabs that include the tower:
http://www.nexusmods.com/fallout4/mods/10140/?
The custom signs mod is one of those huge packs of lore friendly posters/signs that should be easy to find on the nexus.
Spectacle Island is a decent place to build on, other than that you should try some of the custom player settlement mods, they tend to be pretty decent and give tons of space to build shit on