The biggest question is, are you up for having two bunnies.
You will be nearly doubling the cost of having a bunny. Though there is economy of scale for some costs, other costs simply are doubled. If caring for one bunny is a strain on your budget two bunnies will be a problem.
Do you have room for two? Not only will you need a larger habitat for 2 to be together, until they are fully bonded they each need separate habitats. If bonding fails, this could be a permanent need. Do you have the space for each rabbit to have their own space?
Are you up to dealing with the stress of bonding? It takes time and effort. If you and your older bunny are just both in a happy groove, is it worth it?
I have a single male, and he’s very happy. I have no idea where we would put a second condo. A while back Porky had a several hundred dollar visit to the vet ER from a liver infection. It went on the emergency CC. We are still paying it off. Tempting as it is to think of Porky having a freind to snuggle with, staying single just work for the whole family.