Dear Nuno,
If you want to work full-time in the skydiving industry, you will have to travel with the seasons (e.g. summer in the Netherlands and winters in Portugal). You will also find that the more ratings you have, the more money you can make.
I worked as a full-time skydiver for 18 years. By the end I had tandem, static-line, IAD, FF, tandem and rigger ratings. ... and I did a few hundred camera jumps ... I had also worked as a jump pilot (before you needed a commercial pilot license in Canada). Before that I repaired airplanes in the air force (but never earned the civilian license). The disadvantage of being a rigger is that you are always repairing something while the other jumpers are drinking beer and chatting up girls. I often worked 70 hours per week in June, July, August and September.
I had enough ratings that I could avoid boring DZ jobs like mowing the lawn, picking up trash, sweeping hangars, etc.