what is usher's family work, wealth,and reputation.

There is no real indication of what the family's wealth is. The family is aristocratic, but it has produced no true line of heirs. The house is generally falling apart, but it is described as almost a castle-like structure, so there must have been wealth at some point in the family history.

From the text,

" I really knew little of my friend. His reserve had been always excessive and habitual. I was aware, however, that his very ancient family had been noted, time out of mind, for a peculiar sensibility of temperament, displaying itself, through long ages, in many works of exalted art, and manifested, of late, in repeated deeds of munificent yet unobtrusive charity, as well as in a passionate devotion to the intricacies, perhaps even more than to the orthodox and easily recognisable beauties, of musical science. I had learned, too, the very remarkable fact, that the stem of the Usher race, all time-honored as it was, had put forth, at no period, any enduring branch ; in other words, that the entire family lay in the direct line of descent."