Customer reported system not keeping up. Outdoor coil fins are corroding apart due to salt air. Tech found Goodman package unit running on arrival. Mobile home crawlspace is cool. Insulation is missing entirely from crawlspace subfloor and ductwork is laying on the ground without any clearance to properly hang it up. Suction pressure is slightly low. Superheat is high. System has no subcooling. Tech diagnosed system to be 1-2 lbs low on R410a. Tech recommended charging system today and getting quotes on outdoor coil and duct system. Did not recommend maintenance on outdoor coil due to fins falling apart. Need to call back on system and duct quote. Has an outdoor spigot that’s leaking. Need to schedule plumber.