If you can, I would bulk age until it's how you like it, then bottle.
Which is exactly how I manage this part of the process.
If you want to bottle in beer bottles, then that's fine.
Some people worry about the slightly larger air space, in relation to the the amount of liquid in a beer bottle (when compared to the size of a wine bottle), and use oxygen absorbing caps - which is equally fine.
If I use beer bottles, I just try to store them up right. Because there's no cork that needs to be kept moist like with corks and wine bottles, plus even brand new caps will have been rattling around in a bag or box prior to purchase and keeping them upright, helps remove any chance of liquid contact with steel that might have been scratched by the edges of other caps and in theory could rust over time (it's not generally a problem, because there's the plastic seal piece built into the cap - but some people like to be very anal in their precautions).
Then, at least in theory, it should at least last as long as the sell by/use by date codes used on beers, probably much longer, as meads are much higher alcohol and don't degrade like beers do. So I'd have thought that once in the bottle, and capped, you should have 2 to 3 years at least, probably much longer.
