Others have said it, with your budget and size restrictions, your options are really limited. The small Asian stuff are poor quality; the small European machines are very expensive; good used American iron (like Rockwell and Clausing) is too big.
For tabletop mills (say under 50lb), I have a feeling you will not be happy with the Asian "mini-mill". Visit your local Harbor Freight store and see one. Sherline (U.S. made) makes good stuff, but your project list says to me you will outgrow it.
For benchtops, you have the mill-drills, all of them Asian these days. Quality depends on the brand and model. All of them are too heavy for you (500-700 lb), and the better ones (Grizzly #G0519, looks like a miniature bed mill) are above your budget.
I would take a look at the Taig vertical mill, which is the largest tabletop mill I know of, is U.S. made, and the price puts it in the middle of your budget, which leaves room for tooling. From your project list, I still have the feeling you will outgrow it.
I would honestly reconsider your requirements. Do you really have a "weight" lmit, or is it a "size" limitation? Are you planning to move machinery down into a basement, for example. I dont know the layout of your shop, but if you could "chop in half" one of your benches or tables, to make room for a small floor standing Clausing, Rockwell, (or Asian equivalent) mill, that would really open up a lot of possibilities for you. The Clausing and Rockwell mill (each about 800 lb) can be taken apart into managable pieces. Here's an example of an Asian version of the Clausing: <
http://www.kinzers.com/don/ForSale/BenchMill/> which is an older version of the G3102 someone mentioned earlier. This mill is really at the heavy end of benchtops and light end of floor standing.
Great deals on accurate, completely tooled machines can come up (we've all seen the "tool gloat" postings) well under your budget, but they might not make your size/weight limit. If you believe you might have a size limitation, then I would suggest doing an internet search to see how others have crammed full size mills, lathes, and everything else you need, into extremely small workshops. You'll also probably run into examples on how others have moved full sized machinery into their basements.
Jeff
(no affiliation or recommendation of any sellers mentioned)
[This message has been edited by mendoje1 (edited 03-14-2004).]