Here's a pattern you might be able to adapt to your needs. I did cut this on the scroll saw to make sure everything looked proportional. I'd suggest for straighter lines and to make them faster, cut them on a table saw. I put the sizes on the pattern with the assumption that you use 1/4" stock. Make any adjustments for thinner wood.
Hope this helps.
If you make the roof removable, it makes a nice box. Add a chimney and you can market it as an incense box. Add a coin slot in the roof for a small bank. Lots of things you can do with it.