HillTJ, the trick, as always, is going to be to get within a particular mind-set. Just as it takes some mental re-adjustment going from Excel to Access, so it will take some careful mental experimentation to switch from real-time updates to time-deferred operations.
To be honest, this is what was actually done before computers were widely used in retail anyway. And heck, Navy Personnel systems used to literally "cut a transaction tape" on a daily basis and transport via a military vehicle from one office to another; at least, they did so until the advent of network file transfers. In fact, as recently as 2017, they STILL used the phrase "cut a tape" to represent making a transaction file to be transferred to another agency. And they still made backup transaction tapes until about 2005, although that WAS a backup and not the primary means of transportation by that time. I was there; I had to manage one of the tape-cutter systems. The rest of the world might have been doing more modern things, but the Navy didn't start that particular kind of network usage until the early 1990s.