The really great artists are able to make us feel what they were feeling as they experienced the scene. The amazing thing is that artists need very little in order to do this however, some things are essential:
...Brushes & paint, pencils, or chalk
...Artist pad or canvas
...Studio

That is a basic list and most would agree that every artist should have at least those items to start. The first two are self explanatory but a bit more should be said about the studio.

First of all, the studio should be set up with convenience in mind. That means a computer and phone should be near by. It is also good to have a window in the room.

The artist would of course prefer not to be disturbed while working so the area should be free from distractions. Good lighting is necessary in order to get the coloring just right. Since the artist is likely to work for long periods of time comfortable seating is also important.

You also include a small area to house light snacks and perhaps coffee. I am not talking about anything drastic, but the more convenient the studio is the better.

Although basic supplies are minimal, over time every artist accumulates lots of brushes, pencils, chalks and other supplies so storage can become a problem. Adding a small table, a storage cart, or a book shelf will solve that problem.

Bulletin boards can become valuable for displaying work in progress and completed work. This can serve as a motivator to the artist.

One other thing, personalize your space. Decorate with things you love.

Okay, that is enough about the tangible requirements of an artist, now let us talk about the requirements that cannot be seen. These are the ones that the artist is either born with or he develops overtime. I am referring to the ability to notice details about his environment. Not only notice the details but remember them.

True artists can capture details of reality and enhance it. Artists can use their imagination as well. A photo can show us what is real but an artist can show us what feelings he felt as he experienced a dream, or a moment in time. True art makes us feel something.

That is the most important requirement of an artist!