Creekbruin, have you had any luck fixing your MH? There are a few things that can be done for almost free. First, take your rig to a commercial scale and have it weighed (~$10) if possible weigh all 4 corners. Most dealers seem to put the maximum pressure in the tires for some reason. With the actual weight on each tire you can adjust the tire pressure to match that weight. Look up load inflation table for your tire size here:
http://toyotires.com/sites/default/f...ion_tables.pdf
Tire brand does not matter, they are based on the same spec.
This will make the MH less squirrely and ride a little smoother.
Next, search for CHF (Cheap Handling Fix) Changing the mounting hole on the sway bar, has dramatic affects on the handling of the rig. Cost? Free!!! If you have some basic tools and mechanical skills.
A steering stabilizer can have a good effect, too. And add a margin of safety in the event of a front blow-out. Cost: ~$200
Have your alignment checked, add the maximum amount of caster allowed. This will help it track better and want to stay in a straight line.
Even more expensive Bilstein or Koni aftermarket shocks. Cost: ~$750
More expensive is adding a rear track bar and aftermarket sway bar.
The previous owner of my rig went as far as replacing the front suspension with a Keldermann set up. Cost? Not sure, but several thousand at least.
The previous owner of mine did almost everything listed above, except the CHF. I did that myself and noticed about 10-15% improvement in ride quality. I adjusted the tire pressure and that helped noticeably, too. Start with those two and go from there.
Good luck! Hope this helps and is not too late.