I'd get four of these, then you don't have to worry about where you put it. Just jack it from the ground, pull the trailer out. Plus you can reload onto your trailer at any time.
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Hi-Lift XT-605 60" X-TREME ...
Powerbuilt 2 Ton UniJack Combination Hydraulic Bottle Jack / Jackstand in 1 Unit, Compact, Portable, Wide Base, for Unibody Sedans, CUVs, SUVs, Cars, - 620470