Photography equipment for an enthusiastic student

Everybody has dreams. I had at least a thousand. I love adventures, travelling, nature, people, I could go on for hours. I've always wanted to have my own horse, I wanted to become a world champion in Pentathlon, I even wanted to work as an actress.

Photography was always close to me, but I decided to try myself for real just 3 years ago. I immediately fell in love with it, I was taking pictures all day and night. After a while I realised I need better equipment, so I while I was studying I started working, then sold my old machine and bought a better used one. It was still a begginner camera, but I loved it so much. Then I saved up a bit more and I could finally afford a better gear.

I met an amazing Hungarian rock band called Rage in Peace 3 year ago, and tried myself at concert photography. I just loved it, I became their official photographer (I'm doing this for fun and to help them become known in Hungary).

I also started taking sports photography, and I was asked to be the official photographer of the Fina's Junior waterpolo world championships.

Soon after I realised, that I love photograph sports lot, I would like to do this seriously, but my equipment is way too weak for this. The images are dark or blurred, my lens are not capable of taking photos in these conditions, I'd need a super zoom lens for this.

I am a student in Corvinus university of Budapest, I live on my own and I'm working at a small company as an intern. I need to pay the bills, buy food, pay my travell passes, I don't have so much money at the end of the month.

I would like to buy a sony 100-400 f4 lens, but in Hungary even the used ones are sold for about 2-3000 dollars.

I would be so happy if you could help me with my dream, even if it is just a little amount, you would definately make my day (and my new lens). :)

Thanks in advance for everyone