Cheapest card i know that gives Guest access is Canara Mastercard World Credit Card,
fee is ₹300/Yr
But you need a Canara account and 10L+ ITR for that
Axis atlas is easier to get but you get guest access by spend based tiers
Or just get multiple basic cards with lounge access like Indusind Tiger, Stan-Chat Easemytrip, HDFC Tata Neu Plus, etc
Will work within india for guest access