Thankyou for your comments,
Ive recently seen an accountant who told me that If i set up an office at home then it that is the same as renting the entire house out. The rented room that will be my office in my own home will make my property an investment property and i will have to pay capital gains tax if i sell. it only for me worked out that i could claim only 5% and so in the long run that wouldnt help. The best thing I did (which I read off an others topic) was because I have an westpac rocket repay account it came with a free offset account which all my income get put into that and also a free low rate credit card so i can spend with that and just pay it off monthly before interest is calculated leaving my entire income offsetting my home loan. That was some great advise. now i can save for my next big investment adventure.

Thanks all