I think one of the most important things for an international candidate is his/her letters of recommendation. I mean, nearly every candidate applying to the program will have good credentials like good scores, good grades etc. Along with being a fit to the program, i think its important that the student's research ability is vouched for by letters from profs who are well known in general and specifically in the univs he or she is applying to.
So if you can sustain yourself for one year (monetarily), i guess go and try doing an internship under a prof from a well known place. I think funding for a reading or a research project in math is tough, so probably u ll ve to pay from your own pocket. But i think working for around 4 months before you apply, will ensure you ll ve a good recommendation and something more concrete in your statement of purpose and you can always show ur interest towards math and how u stuck with it and tried again the next year.
Good luck !!!