The 5er is a 30amp and I will be tapping right off of the main house's 200amp service panel. The short story is we are moving next to my father inlaw on a medical hardship permit and having a manufactured home brought in so I was going to just run the 10/2 wire right out of the service panel (on it's own 110 30 amp breaker)over to the trailer and then after everything is done just disconnect the wire from service panel and then I will have a nice extension RV cord.
The worker at Homedepot said I could not run my RV off of an extension cord like that because I will lose voltage drop at 40' so I would need to use direct bury wire and if it's on top of the ground I would need to sleeve the wire with electrical pvc conduit. The only thing I don't like is I will need to come out of the front of the service panel because it's recessed into the wall unless I drill holes into the wall of the house to snake wire into electrical service box
Again thank you everyone with all the help this forum has help me so many times