Why would you bring it inside? Trees dislike being moved around.
The right way to water is wait till the soil feels dry to the touch and water then thoroughly with a garden hose till water runs from the drainage hole underneath the pot. Do not water on a schedule
Well, I was given to understand the Carmona was an indoor bonsai. As in, as long as it has good access to light and water it could be kept indoors. Even says so on this website and every other around. People I've spoken to have said the same. But maybe I have this all wrong?
I live in a flat so at one point or another during the day, the sunlight will no longer shine on the plant, hence I move it when I'm able so it catches as most as possible.
Temperatures here in Portugal, while warm during the summer, reach freezing temperatures during winter, so I'm thinking it's not a good idea to leave it outside during that time, save for sunny days.