BRYANNA AS YOU PREDICTED MY FAMILY VISA WAS REFUSED TIES TO BOT COUNTRIES,FINANCIAL STATUS,EMPLYMENT ETC SAME LETTER FOR MY DAUGTERS .ITS FUNNY THEY ARE TOO YOUNG FOR EMPLOYMENT AAAA ANY WAYS ANY ADVISE FROM YOU?EVEN MY ONE DAUGHTER WAS NOT GOING WIHT US IT WAS THE STRINGEST TIE TO RETURN TO COUNTRYEven if you submit new evidence of your other ties to India.... IMO, you would be risking another TRV refusal for two reasons if you reapply at this point in time: Purpose of visit + Financial situation.
It would be a good idea to wait for several months before you reapply:
1. You must save up considerably more (Read: Your bank balance.... earned by you.... not borrowed from someone else)
2. As a working adult (7+ years of employment), if you have to depend on your dad to pay for your visit then it seems like you don't have the financial incentive to return to India = Your employment does not pay well
3. Your sister can certainly travel on her own/ you can reapply after her study program has started. It would not seem like you are moving with her
It's your choice though if you want to reapply