Can the discourse markers, thus, consequently, as a result come at the end of a sentence. I think they can in spoken English, but in writing is this okay?
I definitely wouldn't put 'thus' at the end of written or spoken sentences, though we have the old phrase 'and ever was thus', which can go at the end. 'Consequently' might be OK, but I don't think I would. They don't have to come right at the beginning; both can come after the subject.