You will need 120VAC service, hot and cold water lines, drain and if you use a vented dryer you’ll be putting a 4” hole in the sidewall.
Once you have that figured out, the install is straight forward. There is a kit that secures the dryer to the washer and also kits for the dryer exhaust vent. Catch pan under the washer is your choice as I have seen both, I would try to use one as I worked on a new Newmar high end MH with factory W/D and the washer leaked….
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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.