Here's a trick (that I haven't tried personally): say you're looking for 3 (paid) internships, say you don't care about money, you only want them to improve your resume. Ask if they want to be one of the three companies on your resume. Say you will need $1,500/month just for food/rent, otherwise you work for free. The good thing is you can get an income immediately, and internship income isn't considered a "salary", so in case you do a great job and they want to hire you, you can start a negotiation without the low $1500/month working against you.
The reason this can work is that many companies (including all the ones I worked at) are happy to pay for a small number of interns over the summer.
$1500/month is a lot in 3rd world countries. Senior engineers in my country get paid somewhere between $800 - $1500 (maybe even less due to weakening of currency).
The reason this can work is that many companies (including all the ones I worked at) are happy to pay for a small number of interns over the summer.