1 Material and labor for a wood retaining wall runs approximately $20-$25 a square face foot (and there's usually a minimum charge for small projects), which would be about $1,000-$1,300 for a 50-square-face-foot wall. Materials and installation for a stone retaining wall start around $25-$40 a square face foot and go up depending on materials, site conditions, and other factors.
MFWD (mechanical front wheel drive) or front wheel assist tractors generally have smaller tires on the front and the front axle can be mechanically disconnected from the rest of the powertrain in some manner or another.
Note: The tow vehicle and RV each have a GVWR. GAWR (Gross Axle Weight Rating) is the maximum allowable weight each axle assembly is designed to carry, as measured at the tires, including the weight of the axle assembly itself. The GAWR is specified by the vehicle manufacturer.