no start or charging issue

i have a 2003 tiburon 2.0l and it just started doing this i think it is the alternator but wanna see if anyone else has had this issue and figured it out before i spend 250 on a rebuilt alt.
so if anyone can help i would appreciate it.

so far i have changed batteries and after it runs for abit it wont restart till i boost it but still has lots of power to run stereo and lights and blower motor etc but when i goto start it all i get is abunch of clicking