Good tutorial, I learned a few things here. I do have advice on replacing cars faster.
I replace 120 or so cars in game in seconds with the EMF mod. Once you build a folder of cars (you place all loose car files in a single folder) you can add it to your game when you need to re-mod in seconds. I replace all weapons, most cars, and some peds in like 2 min. I can start from scratch and mod the game with all new cars (including tuning parts), new rims, new weapons, new weapon sounds, Visual V and Natrualvision, RDE, about 4-5 other scripts (only well optimized scripts) in less than 1 hour. I prefer to replace cars as I have taken the time over the past year or so selecting only the best cars with a good quality to file size ratio. If the car spawns in traffic I keep it under 15 MB.
I have an i7 and a 980Ti and I get a stable 50 FPS in 2560x1440 all day. The most time consuming thing is building your vehicle folder, but take your time and do it right, once it's built you never have to replace cars one at a time ever again.
So for those that want to check it out, EMF folder can be found here: https://www.gta5-mods.com/tools/car-weapon-folder-for-replacer