I hate the fire code and there should be a cheat to get rid of it but I don't think
there's a way.

if you don't mind losing your house u have at the moment, put cheats on (pause, Lt, rt,
lb, Rb, yes, bla bla, spoot the magic llama) get tons of money, and move to the most
south-eastern house, normally owned by the landgraab family, there is a HUGE lot there
which will increase your item capacity. i created a mansion thee and the bar didn't even
get halfway!

Go to the world map, find you house (it will be green.) click copy house. Now move to the
Landgraab house, go to world map, click on your new house, click on replace house, and
select the house you had before, continue building and voila!

I just moved into the landgraab family adopted a child (me =d) and killed the original
people in a fire in a shed i built