Parents Visitor Visa

[Naturgrl]

I am planning on applying a visitor visa for my parents. (Technically my dad is applying for one from India)
1. Does it matter if i apply from here or if he does from India?
2. My mom is dependent on my dad as she is a home-maker, she does have some funds in her sayings account.(On her application, we mentioned the same amount as dad and for the question "Is someone else paying you for the trip, we mentioned yes and put my dad's name.) I am planning on attaching a letter of financial support signed by dad, is that fine?

Thanks in advance. Looking forward to hearing for you.
Have a great day!

1. You can apply on their behalf but it is processed from India.
2. Your mom is tied to your dad's application so funds from your dad will be included in her application. You can attach a letter if you want.