there is no such thing as a long-arm with many decorative stitches. long-arms sew straight stitches only...no zig-zag, no hem stitch...straight stitches.
for an inexpensive machine with decorative stitches/needle up/needle down features i recommend the brother machines. they start at about $89 ... the one i like the best (sorry don't know the number on it) cost $139 at walmart and held up to many teenagers using it for 4-8 hours a day for 3 summers plus after school time. then i gave the machine to one of the students and she is still using it 4 years later. i know what you are going through, i've managed to wear out a couple machines myself.