I know someone who has a similar dream of owning a house and lot at a young age. His master plan considering his time table, cash flow, work, etc was perfect. He was able to pay the lot in less than 2 years thru pag-ibig. However as time passed by, his expenses started to grow because he had to support his family, some people got sick and he had to help pay the bills, etc. He also starting investing in life insurance and some personal investments for his future. So his cash flow changed tremendously. With his savings, he can already afford to build a house now, but his priorities have changed. Liquidity is more important now than ever.
It is good to have big dreams. Getting a house is probably going to be one of the biggest expenses in our life. If you spend everything on it early without considering savings for your future, you might get stuck at some point. Furthermore, are you sure that you will live in that house till you retire? If you get married and have your own family already, can you raise your family there? You have to take note that your property will stay put and you cannot bring it with you if you decide to move elsewhere in the future. Try to think about your cash flow again, and consider your possible future expenses too. It will be wiser to invest your savings in something that will be able to make it grow. And then you can use the earnings you get for your future house