Peaches..
I teach workshops..though primarily acrylic and oils. I was an art
teacher for seven years though and am familiar with materials. The truth
is..many artists would refuse to work with the brushes that I use
because I simply cannot afford to keep buying new brushes or the BEST!
Yet, I have developed prowess in my field mastering techniques enough to
have won some major art competitions.
I guess what I'm trying to say is..with patience and determination you
can learn to work with what you can afford. It would be nice to have a
$45-$75 red sable flat watercolor brush for washes. But for that same
amount of money you could buy an arsenal of cheaper brushes.
I would look to the brushes that are a synthetic imitation of red sable.
The ones I'd stay away from are brushes with cheap looking metal furrels
with camel hairs. They are notorious for having hair fall out all the
time. Also, becareful not to use warm/hot water in cleaning brushes as
it loosens the glues that hold the bristles within the metal furrel.
Good luck! Larry