Thank you skywardhunter, sydtogla and lamprey. So kind of you to take the time to reply. Have had a response via email from Marhaba. They do offer this service for a fee.

Another scenario - if for some reason the checked luggage hasnt arrived via Ethiopian at DXB then I am truly in a fix, for Marhaba cant do anything about it as theres nothing they can do if the bags are not on the carousel, and I would have to chase Ethiopian after reaching my final destination in India.

All in all just hand luggage option seems to look better with no worries at all. Must watch those videos where people pack in an incredible amount of shirts and trousers and even shoes in a carry on!!