The way the guy talks isn't very proffessional. I'd be more likely to trust someone with a website full of pictures, references that I could contact, and obvious business sense.
Its also odd for someone to just randomly come up to you and say all of that. Thats very direct and simple. Sounds too much like someone trying to turn a quick buck.
Trial and error can be fun n.n I rebuilt the bulk of my house 3 times before I got it to a look I enjoy XD Same with paint and flooring. There used to be some proffessional builders around who were really fantastic, but as the name implies, they were very proffessional and full of references, pictures, and proper grammar.