i jus turned 20 a lil while ago, still livign at home

i can afford to move out but i feel like im gonna be throwing money down the toilet on renting or/but i'll get screwed on an interest rate if i buy a house right now before my credit is nice n established. i own an investment property which is gonna help establish my credit but it'll probably take a while (till im 21)
am i being smart with my money for doing this or am i just a cheap bastard who needs to get out??