I'm also having this issue with The Castle once it upgrades to level 1, does anyone know if future upgrades fixes this issue? For instance when it gets to 2 or 3 will it resolve the CTD? I'm also having a similar issue in Somerset(?) I just built it and waited for the scripts to finish (once all the houses and business notifications finished) and tried to build a generator for some missile turrets and got a CTD as soon as I plopped the fusion generator. This happened three times in a row. The fourth time I actually rested for an hour and then tried, I was allowed to build the generator and the turrets but while I was attaching power lines I got yet another CTD. This is like my tenth Rise settlement and all of the others I was able to build fusion generators and turrets without an issue. I actually have very few mods (20ish?) but most are fairly DLC sized like Project X adding entire new areas (though Project X does tend to make use of current areas from what I've seen). Maybe I just have too many scripts running? I know that used to be an issue with Skyrim, though I know very little about modding beyond becoming a semi-pro when it came to forcing mods to play well together for Skyrim.