As long as you get the measurements right the mod shouldn't be too difficult.
I just finished replacing our couch with cabinets and cat crates. I did have to disassemble the couch (remove the arms) to get it out of the door. 4 screws and 2 nuts removed and the couch was out.
__________________
Dave
US Army (Ret)
2020 Entegra Accolade 37TS
2019 Jeep Grand Cherokee Trailhawk TOAD