Jonieakl Please test with no mods or custom content at all, as in, move the Mods folder to the desktop. You don't need to save your progress.
If you still get lag, please try playing with a different household in the same save.
The lastexception may or may not be helpful here, but more relevant would be the results of the testing above. If you do want to provide an LE, please delete your current ones now, and only upload one generated with no mods or cc. To attach it to a reply here, you'll need to open the file and delete the first line of text.
Thanks I'll give it a go now.
