Joye wrote: Also, you can invite a professional engineer ...
You can "invite" a professional engineer to do almost anything. If you invite him over for a steak dinner or a beer, most will accept and not charge you. If you invite him to offer professional services however, he or she may have to charge you the professional rate. All of which is irrelevant, as you won't find many professional engineers whose degree is in tear drops and tiny travel trailers.

Ya just gotta laugh when a spammer gets on here and offers advice on its first post, with no evidence that it understands we are talking about campers!

Tom