My base score is 3309. It could be all the cows that are in my pen. That was back when the cows would breed all willy nilly. I could try killing a bunch of 'em and see if that brings my frame rates back up. I also have a TON of bonfires that I used to light up my entire home base so that I could see in the dark when the raids come (because the little drone guy only lights up the path behind you when you're moving, so you can't see anything in front of you). However, the frame rates were low before I did that. I did that because I was bored and wanted something productive to do. But I'm sure it didn't help. The animations of the flames on the bonfire might be a bit taxing, I don't know. I think it would be interesting to have a cap on things themselves. Where a base can only consist of a certain amount of walls, and that gives incentive to actually build the wagon and go somewhere else when the base you're at now is too small for what you want. Maybe you can only have a certain number of cows on a base, chickens, things like that. I think that would be a good idea. Good thinking!
I don't know what you want from my CAMPSTARTER.ini but it's hundreds of lines long, and I'm sure you don't want it slapped into this reply. I'd make a spoiler or attach the file but I don't know how/or if you can.