The second file cabinet in the law office has the drawers labeled in reverse order: H, G, F, E. The rest are in alphabetical order, and the second has been in the proper order in previous episodes. Presumably it was varied in this episode so David could file the Harrison folder without squatting down to the floor, although they could've just used a last name beginning with E or F for that character to avoid this.
It appears that Rick does not have any type of job before being hired by David, except that he is a full time student at college. With no job and Kris not working (as was typical of the wives in this show), Rick has no source of income to afford a home and living expenses.