how big of chest freezer should i get?

I am moving to get out of bottling and into kegging. I have been searching CL for chest freezers since they seem to be better in the long run for brewing than a kegerator. I brew 5g batches but would love to switch to 10s.. I don't see myself using more than 4 cornys at any given time, what interior cf do you recommend I get? Does age of freezer make a difference? Any information on the topic would really help since I'm a little overwhelmed with this transition right now. Thanks, cheers.

Also, in terms of corny kegs is there any advantage or limitations between ball lock or pin lock in the long run? Thanks, cheers.

Check out this thread: https://www.homebrewtalk.com/f35/sizing-your-chest-freezer-corny-kegs-75449/

I feel dumb.. sorry thank you!

Ball locks are taller and skinnier than pin locks. I think most of the pics in that thread are using ball locks