Affiliate Marketing Secrets

Im 17 and im self employed, Im an ebay seller and affiliate and currently in the process of setting up my own website which will generate money then i hope to open some franchise’s.
I have never made anything bellow 5000 and above 18000 each month so a pretty steady income. Im wanting to move out but as im only 17 I don’t know if i can. Preferably I would rather get a mortgage and buy a house rather than paying off some one elses mortgage whilst renting. However would I be allowed to get a mortgage, I have no one who could get it out for me as my only close family is my nan and grandad and my auntie my nan and grandad are both over the age limit and my auntie is a house wife.
I only want a small flat that would cost about 550 a month to rent of 500 a month mortgage repayments, My nan and grandad could be my guarantor if I was too rent but would the land lord let me rent???