QGIS should be fine.
I would recommend two more software for you. You may want to learn some CAD functionalities in order to manage the reference points and engineering drawings. Try AutoCAD Map (free student version should suffice) or similar products for that. You may also like to bring up quick maps, use them for your business or share them online. Give Mapbox a try.
Thank you for this reply,
It looks like I need to get my head around QGIS then, unfortunately I don't think we have the budget for ARCgis at the moment!
I will have a go over the next couple of weeks and see how I get on.
Thank you again.