Nothing wrong with a refurbished machine! My primary sewing machine is a Kenmore Elite. I bought it over 20 years ago, used, with full warranty (it was a return, the gal who bought it said it was "too complicated"). It's a computerized machine and still going strong. Embroidery only machines have become much more reasonably priced since the combo machines came out.
I have a "cheat sheet" that I give to people who buy embroidery machines from me or get a new machine. It explains stabilizers and talks about thread and websites for tutorials and purchasing good products at reasonable prices. I could send it to you if you'd like. Just send me a PM.