What is the limit of mods with the addon method?

[mich]

Hi Guys, one question?

What is the limit of mods in the game? In particular cars in the game

In my case I used the method of replacing until the game was crashed by the resolution of cars and had many

Now I use the addon method, except the planes and helicopters that I replace, but exactly with the method addon how many cars can you have?

Sorry if I express myself poorly, English is not my mother tongue

Thanks in advance for your answers