I am wishing you all the best of luck, you have a big ambition however it is possible with hard work.
I have used UserTesting it does pay well, very worthwhile. Problem is to 'catch' the tests when available and be the first to grab them, must leave browser open and be ready for the chime when a new job pops up. But it really pays, $10 for 15-20min tests.
Another you can consider is UpWork.com –Takes some time to build up a profile and get the first jobs, but also has been a lifeline to me ...