that would be his problem right there! as the kids say these days, "lollers"
of course hes going to be knackered from pushing it uphill!
ill bet your mate on the fsr climbs fine?
it sounds to me like your in the same boat as me, i was getting battered having moved to somewhere much rockier than i was used to, but didnt want to give up actually having to make an effort to ride.
4" travel takes the edge off, but doesnt make it toooo easy.
also helps on techy climbs!
trance here 🙂 its awesome (though looks a little bland)
if your going frame only, you could pick one up for a few hundred quid.
if you want for a whole bike, i believe they come into the "£1k top value FSers" class, if you go for the lower end ones.