Thank you for the response. I would love to steer clear of D.I.Y merely because I would like to create continuity within the company. If I leave, they should be able to move ahead with it. But your point is very valid. Indeed something like an influxDB with grafana might be a good idea.

I have not thought of Zabbix, thank you for the proposal. I will give it a go and see if this can be a fit somehow. Thank you again for taking the time to respond.