It just depends on how far you need to scan the rabbits at, ( not shoot them ) as if youve got a large field, the red filter on a tracer max will put eyes up a good distance away so you can head over to get the shot.
If your only scanning for rabbits out to say 100 yards then yes, a smaller one will do fine.
Bear in mind that a cheap scope may cause difficulty in getting a clear shot with a low powered lamp, whereas a quality scope, maybe with a larger lens will give a much clearer sight picture, with the same lamp, so depending on what scope you use or are planning to buy, bear this i