Tools

larger farm type items, hydraulics, transmissions, wheels,bearings
www.surpluscenter.com
www.northerntool.com
applied industrial

warehouse supply, shop tools, etc
www.mcmaster.com
www.Grainger.com
www.msc-direct.com
www.harborfreight.com
craigslist

Tool list:
Oxy acetylene or Propane (propane may be preferable - since mostly for cutting and heating rather than welding)
metal cutting bandsaw (or sawzall or hacksaw)
Grinder (4 1/2 inch for starters)
Basic stick welder (or Mig, better; mobile stick or mig also acts as backup generator for the farm)
Drill Press (Floor model with low RPMs might be better than table-mount)
Rod cans to prevent rusty rods
Basic mechanic drive set (1/2", 3/8")
Auto darkening helmet (can get for roughly $100)
Heavy vice
Vicegrips all sorts