Hi Aaron -
Are you referring to the original 4 x 12 foot HO track plan from 2009? If you scale that plan directly to N-scale, it will convert to a N-scale plan that is approximately 2.5 x 7 feet. If you have the space, then a 3 x 8 version would be even better (slightly less crowded).
Depending on which brand of turnouts you use, you might have to make some small adjustments to the track plan, but basically, the N-scale plan should look very much like the HO plan. That's not always the case when you convert from HO to N-scale, but in this case it should be straightforward.
If you search with Google, you will find a few discussions of N-scale versions of the Beer Line.
- Jeff