Little back story. I am a 50 year old union carpenter. 2 years ago I tore my bicep tendon on the job. 2 years and 3 surgeries later I am finally on the mend but my new surgeon has all but come out and said the first guy that did first 2 operations made several mistakes and I will never get full use. I can weld and do carpentry still but not at a "professional" pace.
I am looking to "reinvent" myself and am looking at possibly going into the custom enclosed trailer conversion business where I can be my own boss and set time tables that are within my new limits.
So the story is to say this. Over the years I have made alot of work doing side jobs for people that want custom work but do not actually have the ability or time to do it themselves. If you have an eye for detail and can sell yourself and your product then there's a good chance that people will pay you to do it.
Do alot of home work on the current manufactured TT's then when you think you have done enough do some more. Use quality products and materials rather than what the companies use. If a customer complains you could use cheaper material like the companies do have the strength to tell them that they should buy from them then.
If you want to build TT like the big companies then don't bother because you can't compete with their material bulk price. Build Cadillacs and those that want them will pay.