Buying a house in current market

Hi everyone I am 25 years old looking to purchase my first home and I have a few questions if people can give me some advice please. I earn 78k per year. I have roughly 70k deposit. My main question is can I use my parents to help me get a loan? The brokers I spoke to said I can get 400-420k and I don’t think that is enough. I’m not too keen on getting an apartment aswell. I also have the option of buying land and getting the title in March/April then once I earn more can build a house on it which will cost me under 600k depending on the suburb.

I am really confused on what to do Any advice Perth people?