Hello, thanks for your reply!
To answer your questions:
1. I have deleted ozzy & miriam's retro sewing machine and simmerkate's futuristic gaming setup. The game wouldn't load at all with those for some reason. Now I find it's about 50/50 as some households will load while others will not or will even give an exception.
3. I don't have a scan report since BE gets stuck in the process. I have left it several times to scan for over an hour. I have also halved my mods and scanned those to make it easier, but it still gets stuck.
4. I have over 300 mods and frankly can't write down all of those so I tried sending screenshots instead, but I can't attach more than 3 files at a time unfortunately. I know that seems excessive but I always read the creator's notes and check for conflicts (I still make mistakes) I have a fairly good gaming laptop and I've been playing with these mods for years with no issues.
I have backed up my saves. This happened after the mandatory June update, unfortunately. I have just spent ages updating all my mods so everything should be up and working 'in theory.' I've spent all day testing to see if households load with/without either mod/cc files because it could be a corrupt save file I guess. That's all I can think of.