Visitor Visa for my Parents and In Laws in successive weeks

[h1b_Prani]

Hi All,

I have scheduled appointment at successive weeks for my parents and in laws.

Details:
Father - 59 yrs - Retired
Mother - 53 yrs - Homemaker


Father in law - 55 yrs - working in central govt
Mother in law - 50 yrs - Homemaker
Sister in law - 22 yrs - Got placed in an IT Company - Yet to join(got offer letter)

Could you please let me know if my future extensions would be an issue??

Would there be any issue in my parents and in laws getting their visitor visas??

My parents would be travelling in a month and my sis in law alone would travel with them.