is it possible to use a bow with it?
Absolutely. Unless it's a bass guitar on a stick (like a Dean Pace or a Barker), with a flat fingerboard.
You should check out the newb links in the DB forum. Many of your answers regarding bowing will be in there.
Cheapness... EUB vs. DB.... that's about ten threads all by itself. Cheap now is often expensive later.
In the realm of affordable EUBs, people seem to like those Ergo basses.
I do not think that six strings are anywhere near necessary for just about anyone playing EUB. Mine have all been fours and fives, and my double bass is a four. DB strings are expensive!
One other thing... if you haven't done it yet, you should get your hands on an upright bass, either a real one or an EUB. Sometimes they seems like a good idea until you start dealing with 41 inches of scale length. It's why you see a lot of cheap used DBs for sale, I think. Not trying to dissuade you, but maybe borrow or rent something for a minute first.
As a guy who spends much of his time playing acoustic double basses for a living, I'm not ashamed to admit... bowing my EUB through the house sound, through a couple of subwoofers, is a definite rush.
