Hi...
Dont worry Ok.
30 years of age is still young.....
Do you know Colonel Sanders started KFC when he was already an
elderly.....
I have an uncle who started his own company when he was in his
late 30s.....
There is no such thing as "too late" , or "too old"
Trust me on this one.
So just work and save money gradually.....then slowly, you can
save up and use the money to get the PhD.
But actually, maybe you can also attend some industrial
certification....Why I say that.....because there may be smaller
niche for some PhD fields.....it depends.....and you may get more
benefit from getting an industrial certification.....it may boost
your marketability and earning power......you can still aim for the
PhD for later if you want.....
Ok good luck.