[Kidkraz]

Do you know the size and rating of the tires and the axle of the TM? I'm sure the tires have been replaced since it's a 2010, but what size and rating are on it currently? The axle "should" be a 3500 LB Dexter. If you have a copy of the blue owners book, you might find that in there. Some have 5000 Lb axles, but most are 3500 Lb.
The stabilizers should also be rated to support the camper. I don't know what was the OEM version on my camper when I recieved it, but I always had extension/retraction issues, even after lubing several times. I ended up installing BAL 24002D has 4" to 23-3/4" extension. 7,500 lb. capacity.
Your tires carry the majority of the weight.
What version is the tongue jack? Mine is Husky 87641 rated at 4500 LBs, again possibly over kill, but I'd rather have more power or support capabilities then just maybe enough.
My driveway has kinda steep, but I've never worried about the jacks or tires not being able to support or handle the grade. I did try to make the wooden supports for the front jacks to have an angle to minimise the steepness. That would be my suggestion in your case, until you know more info on the tires, jacks and such.
This pic is before I installed to electric jack. One thing I find is the slope makes it a bit easier for me to lifting the front shell when I open the camper up.