It's too bad we have to even consider these alternatives. In a perfect
situation all schools would have both an art room and sinks. Alas, in
these days of budget cutbacks and elimination of Fine Arts, most art
teachers have to contend with less than ideal situations.
I have had the opportunity to teach in both types of settings. I've
traveled on the cart where each of the rooms had sinks. I had a room
with a sink and now have a room without a sink. Given that you don't
have the middle choice, we'll have to consider the other two.
Based on personal experience, I'd say that your best bet would be to
choose the art room. While you use art materials every day, you only use
materials requiring a sink on select days or for select projects. By
having an art room, I can spend my 5 minutes inbetween classes preparing
for the next class rather than loading up the cart and traveling to the
next classroom. By having my own room,I can organize things how I want
to,set up things to my preference, and leave the room in the condition as
I see fit. I now don't have to worry about the expression on meticulous
teachers' faces when they see a few unnoticed drops of paint or clay
residue on students' desks.
In response to your concerns with no sink, consider a few things. How
close is your room to a sink? Is the sink accessible and available for
art materials usage? Depending on the project and the students, I either
let students go two at a time to wash their hands or I just have buckets
of soapy water in the classroom. Looking on the positive side, I don't
have to see the grimy paint-splattered sink in my room every day! I hope
I gave you some points to consider.