I believe it has been established (in other threads) that this is a grantor trust and, as such, there are different filing options (one of which would eliminate the need to file a 1041 completely).
Regardless, the $650 is not really out of line for a professional tax preparer to prepare and file a 1041 for a grantor trust. You can certainly prepare it yourself (if the income is simply interest and dividends) and save some money.
