The motors aren't designed to lift the frame. Easiest way is to set the trailer about 1" nose low. Set rear stab jacks, then use tongue jack to lift front about 1" nose high. Then set front stab jacks and lower tongue jack. IIRC the jacks are rated for 5,000 lbs. it's the motors that are weak.
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.