I contacted a professor in a foreign university for a possible research internship in his lab. He is willing to accept me as an intern, but has stated that since he barely knows me and it is the first time I will be working under him, he will not provide any financial support.
I have read his publications, his areas of interest match with mine, and I believe that his papers were among the most exciting ones I have read so far. Being an undergraduate, I have limited funding of my own and I don't want to miss this opportunity because of lack of resources.
Since he mentioned 'will not fund' instead of 'cannot fund', I feel that there is some scope to convince him. Can someone advise me regarding what I should say to do so, without being rude? I would appreciate any help.