One of the difficulty in researching those of the lower economic classes is that certain records were concentrated on those with money or property. Land records required owning land, estate records required having an estate.
The simple fact is that people without much money left fewer records. They were less settled, more mobile and didn't always leave information to help connect them between one place and another.
Church records and census records are two types of records that typically were not focused on a certain economic group. And there are even exceptions to that. Those with additional ideas can post them here as suggestions.