dropping out but still going somewhere

N🌻
So I've decided if I can get a job and a car before school starts next year I will drop out. But later that year I will sit the stat test, and go to uni the following year if I get the right score. In the mean time I will working full time saving to move out before I begin uni. 
It was either that plan or I continue my last year of school, barely have a job I could do. Not have enough money to move out, and have to postpone uni because I couldn't afford to move out, start uni and live. 
Do you believe dropping out of school but continuing a plan to still go to uni and save is a good idea? 
There's more to wanting to move out. I would still have to pay a huge amount of rent at home. I have an unbelievable amount of responsibility, yes I understand moving out is huge too. But I wouldn't have to watch a child that isn't mine 24/7. I would also feel more welcome in a house I payed for than the one I'm meant to call home. 

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