The more money a person had, the more records they tend to leave. An ancestor of mine appeared in several lawsuits, land records, and other dealings in Kentucky and Virginia between roughly 1790 and 1825. Then nothing. Nothing at all.
A closer reading of one of the later court cases in which he was involved indicated that he was "nearly insolvent."
That might explain why there was no probate for him upon his death. Sometimes a close reading of what documents you are able to obtain explains why more aren't available.