Unless The Netherlands is very different from the UK - and it won't be because it's governed by the same human rights legislation/directives (long may that continue), it is illegal to sell blood, blood products, body parts, or bodily functions, for extremely sound ethical reasons. We don't want an American situation where the poor (and it's always the poor) are flogging blood products or renting their wombs out to survive. These services are provided for in law, as long as the motivation is altruism and not profit. Selling plasma, or anything else, will not be an option.
As I say, the ethical reasons behind this are pretty sound. Just as European societies don't want that situation to develop, neither do we want the consequences or the implications of healthcare being bought and sold - with people paying out of pocket for costs and life expectancy being reduced, or American rates of HIV infection which are frankly quite frightening and would be at risk of increasing if blood was sold privately.
I am always astonished by the percentages infected over there. I recall seeing a figure of 1 in 25 people in Washington DC. The rates in Western European cities don't extend beyond more than half of 1%, and that includes cities with very substantial sub Saharan populations.
I can understand how frustrating it is to have no money, but your options will be limited to whatever credit or bank loans you can raise when your income (presumably state benefits) is weighed up. Or you could look for a charity/some other source of funding. I have recently been working with an FtM and finding him alternative sources of funding for things that are desirable but that healthcare doesn't cover.
I don't know how your autism affects you and to what extent, but there are presumably some jobs you could do, and some employers who would not be prejudiced. In the worst case scenario, couldn't you get an interview and then claim compensation for not being given a fair chance at doing the job? There must be provision in The Netherlands for application forms to include details of your autism (along with a legal requirement under legislation surrounding protected characteristics) that would guarantee that you get through to at least the interview stage. What you do there is then up to you.