SOLUTION: I was running two different circuit racetrack mods simultaneously and they were conflicting with one another!
So I've come across my game always crashing every single time I drive past this one specific spot in Paleto Bay:
It's literally a box-shaped area starting perpendicular to Paleto Bay's Ammu-Nation on the train tracks/highway
What have I tried:
Running a vanilla/clean version of GTA = works
Running a vanilla/clean gameconfig.xml = does not work
Mods I'm running:
-heap limit adjuster
-no boundary limits
-Open All Interiors
-about 65 addon/replaced vehicles in the game
-liveries for: benson, pounder, mule, semi trailers, jet
-one custom t-shirt for all 3 characters
I have not tried deleting mods like add-on/replace vehicles because I don't think that's the cause, and I'd like to leave this option as a last resort.
My game works great with everything and everywhere else, even when I fly! EXCEPT when I drive through this specific spot in Paleto Bay
Any ideas where do I go from here? What should I try? If you need pictures of logs just please ask and tell me where do I get them!
Thanks in advance