>>11191825>>111918253d printing (model I found online, mostly for free or just 2-3 euros) and basic tamiya acrylic paint, for the wall it's real wallpaper that you could use for a real wall, for the poster I just scaled them down in openoffice, same for the manga
I can provide the ready to print manga if you want
For the bed it's real fabric (thank mom)
Also we don't see it but next to the tv there is vinyle (orange thing, it's a deathspell omega) I printed small plastic square and glued a cover on it, same for the videogames, it's easy to find full cover on pinterest and such
For the gunpla box, I made them myself with scan I found online
It's costed me less than 1kg of plastic (1kg=20 euros)
Here the focus was made on the back so you can see it more