I  don't know what your definition of inexpensive is, but I used to work
for a software company in
Edina Minnesota (Mpls suburb) that sold AP, GL, AR, FA,  and order entry,
inventory, purchasing and
a payroll module.  Buy one, or several.   This company was Technalysis
Corp.  Which has been
purchased by Compuware.    Try calling the Compuware Minneapolis office.
Rollie Gronholz was
the sales manager (don't know any longer who is in charge).

Paul D. Christensen
PC Enterprises Inc.
Osakis MN