I'm gonna be nosey and ask what you do for a living.I'll give myself one wall, then maybe if it doesn't work out will call someone in.
Whatever you do, never had the feeling that people should stick to what is within their reasonable reach?
Once again, plastering is not a trade for everyone, same as decorating.
Looks easy, but then we hear of many disasters here on this forums for things that should be a walk in the park: painting, drilling a hole, hanging a tv on the wall, etc.