I went with a Rikon 70-100 mini, It's a solid bench top lathe with a 1/2 hp motor. WAY better quality than HF. I've turned bowls and platter up to 12 inches with no problem.
For pen turning, you will need a pen mandrel. I recommend a mandrel saver that mounts in your tail stock. It keeps you from bending the mandrel and keeps it more stable.
If all you plan on turning is pens, a gouge is all you will need. A scraper is nice for the last cut but not essential. Also pen kits and bushings of course. Watch some YouTube videos, pen turning is quite easy.
Eventually you will want to turn other things and will acquire a face plate, a nice chuck (Nova G3 is great), various chuck jaws, a spur drive, a live center, and more gouges.
Don't buy a set of turning tools, many of them you will not use. Buy the best quality tool you can afford, one at a time. A good 3/8" bowl gouge and a parting tool could be all you need. I have 2 skew chisels that I never use.
Have fun and be safe!
creating exotic sawdust and expensive kindling since 1989