For me I think I would have the spellcasting sheet and inventory sheets be separate sheets which can be expanded by just printing out more sheets. Who knows how many homebrew items or spells you'll get, so I just like being able to print out a new sheet whenever I need one.
Btw I was wondering what applications you were using to edit the character sheet and what is the font used on the character sheet? I wanted to see if I could customize the sheet for my use to include resistances, conditions, ability usages, etc