The major issue with this is that Jewish immigration was an overwhelmingly urban phenomenon. Meaning that Jews came from urban small and medium-sized cities where they entered the work force as tailors, milliners etc.
The majority of the pre-1880 Jewish immigration came from urban areas of Western Germany and as a result, few were prepared to farm. Most settled in cities and particularly in New York City with many becoming successful in commerce and finance. Some of these families branched out to form the large retail establishments throughout many U.S. cities. Between the 1880s and 1920s when the bulk of Jewish immigration to the U.S. arrived, the majority came from the Pale of Settlement under Russian rule where they were largely banned from agriculture. They also came in large numbers from Austria-Hungary, particularly Galicia, and to a lesser extent Rumania and the Ottoman Empire. These were often much poorer, though with their background as skilled and semi-skilled workers, sought out jobs in New York City,
Poorer and less "westernised" than German Jewry they often helped make New York City the capital of America's garment industry. In 1880, only 10% of America's clothing factories were located in New York City. By 1910 this had risen 47%, with Jews constituting 80% of the hat makers, 75% of furriers, 68% of tailors, and 60% the milliners. The other large field would be as merchants, with many becoming peddlers and cart pushers, grocers, bakers and butchers.
By 1920, half of America's Jewish population was concentrated in New York City, and if we add the other cities along the Boston-Washington corridor that number concentrated nearly 70% of all American Jews. If you add the then booming cities of Chicago, Cleveland, St Louis and Detroit, you have nearly 90% of all American Jews concentrated in the large urban areas of the country. In New York, by 1930 they had become the largest ethnic group at just under 1/3rd of the population in the city, and nearly half of the population in the Bronx, and representing over one-third of the population of the Bronx and over one-fourth of that of Manhattan.
Even Jews who remained in Europe tended to migrate to London, Paris, Vienna, Prague and Berlin. In Canada too, the majority of Jews migrated to Montreal and Toronto with those in South America remaining around Buenos Aires and São Paulo.