Unusual situation

Hi,
I am also new to this and have a quick question to get me started on the road to financial independence.
I am an Australian Citizen who works in Europe on a contract basis. Most of the money I make is based on commission and tips so I have no real proof of my true earnings but generally am able to have true savings of minimum $50,000 per annum.(also all my living costs are taken care of whilst working)
I have $80,000 dollars saved and another $90,000 invested in a share portfolio which although performed bad when initially invested in Feb 2002 has now turned the corner and is doing quite well.
I have trouble getting a loan however due to the fact I struggle to prove my income. As I will be buying my first investment property I don’t really want to spend more than the 250,000 mark so even the amount I wish to borrow would not be high.
And advice for where to look for loans for someone in my situation would be much appreciated[blush2]