Yep the battle wagon is dedicated transport for nobz and mnobz. Nobz themselves are 170, + 100 pts for a wagon - just included in their pointcost by army builder. Also a painboy has grot orderly for 5 pts - will write it down to aboid confusion.
I've tested out mboss+regular nobz last game. The opponent apeared to have brought a grav-melta bike list with Khan. But he didn't use the full potential of his alpha-strike even though he got 1 turn. He didn't concentrate his forces on my one flank and just spread them in hopes of exploding more wagons which he didn't manage to do. Also, nobz are somewhat best option vs grav guns cause, ye know, they got 6+ armor save in general. That's a tough matchup for biker army, but it's funny how a 6+ save can be profitable from time to time
Unfortunately, the opponent surrendered turn 2 even though he controled a relic and had a tough comsquad with apothecary, Khan and a generic
CM. Just the ammount of simultaniously disembarked boyz made him think he's got no chances. Though, he had like 18 alive bikers with a
cm vs 60 boyz, a few nobz and some guardians sitting backfield - good chances if you ask me