Yes you can get multiple entry visa for 10 years.
I have applied for 10 year tourist visa for my minor son on the same day we surrendered the Indian Passport. 10 years tourist visa will allow to stay upto 6 months.
You can fill out the tourist visa application online here https://indianvisaonline.gov.in/visa/. This website gives option to upload photo, but I did not upload it. I have pasted it on the printed application.
In visa duration, you can fill out 120 months. The fee for 10 years visa is $240 + consular and BLS charges. Can be paid by cash or debit at BLS.
You need to attach below documents to the printed application
Copy of passport surrender receipt, copies of Indian passport first and last pages, Canada passport Original and a copy,
Landing document copy, in case of minor - Parents Indian PP copies, Canada PP copies, Landing Doc copies and surrender receipts.
Address Proof - I have submitted a copy of my driver's license.
Processing time for tourist visa is one week.
Thanks for the valuable information. That will help. The cost wise, the multiple entry visa is almost same as the OCI cost. But the processing time is much shorter. Is there any other difference? I'm bit confused what I should do considering my upcoming travel plans in August this year. If they delay OCI as they do in many cases, then I end up paying for the tourist visa on top of OCI fee.