Wallpaper Substrate Options?

i have a lot of older wallpapered walls of which here in phase one I have 8 stripped walls. The walls are covered with 1967 1/2 drywall. I have one stand alone wall at least where I tried to retake it my job was poor and I had to tear it out there is gap at least 1/4 “ and it would be much larger if I tore the old tape out, i did some of it because the old mud is cracking and quiet flimsy. Question 1. What should I do tear all the old out and start over with taping? IR 2 Tape over it. I got air in my first attempt even tho it was on the ceiling in the interest of quality I tore it out hence my questions. I will I’ll be back but I’m running some today, any suggestions are appreciated. Thanks

Hi, I will be applying this - [url=https://aspiringwalls.co.nz/shop/metropolis/metropolis-wallpaper-pattern-no-z44555/]wallpaper[/url] [attach]105660[/attach] Standing at the start of hallway looking down, with window on left, door at the end, smaller door on right for cupboard and another bedroom door coming up on the right side. Hall is roughly 4.100 long x 0.900 wide x 2.400m drop. [b]Door arrangements.[/b] [attach]105661[/attach] Where would you start? My concern is when you are looking down the hall, I would like the pattern to flow around all 3 sides as the eyes will always be looking at the end of the hall - and if - the pattern is cut to fit around corners, it may not match and look darf...... Start above the end door in the middle then go either way back down the hall - but that goes against "working away from your light" for half the project until you pass the window.....lol Thanks. P.S [b]Here is my daughters bedroom,[/b] [attach]105662[/attach] [b]and son's bedroom[/b] [attach]105663[/attach]