Probably one of the funniest things to happen is how crashing into a car with the 4x4 has like a 5% change of exploding the vegas and car instantly after it does some weird visual glitches me and my friends even ran into a situation where 3 of us exploded from just crashing into each other with fully fixed cars.
In your place i would probably try to save up till 10k jt to either get a good car or try to get a perma gun that you really like. Anything for 5k jt is kind of a waste of money imo.