Where can i find a small low cost lathe for metal work?
Check Harbor Freight.
As suggested elsewhere, check out Harbor Freight, either online or at one of their retail stores. They also sell a exceptionally cool table top milling machine that comes in compliant for doing metal work. Lets you do things you just cant acheive by hand. I suggest they sell a lathe and a milling machine surrounded by the $300 or so range. They also have several larger and more costly models.
check any used stuff , lathes aren't cheap , though u can engender a lot of money from one