Although this question will always depend on the complexity of the flow, we will try to answer it.
In Athento SE, setting up a six-step process like the one shown in the image takes only 7 minutes and 59 seconds of clock time.
This is done 100% graphically. Of course, associated with the flow, trays, notifications, permissions, automations, etc. must be configured.
A medium/high complexity process in Athento can take about two weeks of work, including trays, permissions, notifications and automations.
As for Athento ECM, designing a flow like the one in the screenshot can take about 4 times longer including deployments from Rhombus.