I'd suggest to buy a good quality 12' telescoping ladder instead of that step ladder.
Consider that your feet, when on the step ladder, will be only 5' above grade. That will not be high enough to access the roof and some folks will have problems reaching the gutters or the roof's aluminum trim edge. Also, if you're standing on the next-to-last step, there will be no hand hold to the ladder.
Folks that are marring the surface of their trailer when deploying a telescoping ladder should either wrap and tape rags/swim floats/pipe insulation to the top of the ladder's rails or use a "stand off".
I own about a dozen ladders and, after 45 yrs. of use, have come to the conclusion that not everyone should use a ladder. My wife will climb a ladder but once she reaches height and looks down will "freeze" from fright. Others are uncomfortable when on a ladder and it is an accident waiting-to-happen.
