If you can afford it, always get a proper decorator in. When the kids were small and money was tight, I’d do my own wallpapering after work. Up stepladders at a ridiculous time of night, fagged out. Coming home from work next day, looking up and noticing a shite bit of trimming, tear it down and start again, false economy. When I could afford it, it was great leaving for work in the morning and the decorator coming in, getting home from work, he’d gone, the job done and I could have my tea in peace.