Who was the friend? Was he ‘informed’ by one of the big bike mags by any chance?
Of course a 5-6″ travel full suss will be fine for most riding, but it strikes me as a bit of an odd recommendation when you say you’ve never ridden offroad.
You should easily be able to get a full suss well under 30lbs for less than the cost of an Ellsworth frame. They are very high end frames by a comparivetly small manufacturer
If you really want a full-suss then fine, but I’d be questioning where and what you want to ride. If you are near freeborn then its not like the lakes, peaks or black trail centre routes are you local playgrounds and would possibly question a full suss at all? Definetly a 6″ travel machine anyway.
Though its your money, and you bike, so don’t listen to my limiting of your bike buying decisions