Some paint questions for the guys who know paint

IM in a similar situation... i was gonna use dupli colors all in one paint system. But im leary of it and keep going back to something my dad always told me growing up..........You never have time to do it right the first time, But you always have time to fix it. Its a job i only wanna do ONCE! So i've decided not to paint my car until i can afford a better quality paint. Just an Oppinion.