[FrankJ]

If you are considering cnc stuff then you are already beyond this advise. But doing robots on a mid size budget.

Band saw: We have a couple of smaller Jet band horizontal saws (1/2x64" blade). They have a table that converts it to a vertical band saw. Horizontal mode is great for cutting stock. The vertical mode is a compromise, but a lot less expensive than a good vertical metal saw. Band saws are considerable safer than the other options for cutting metal. Not to say the other options are dangerous with the right training & safe guards.

Hand held powered band saw: You can get (or make) a stand. A good budget option.

Lathes: I would stay away from the minis, 7xXXs, They will do good work as long as you stay within their capabilities, but are fragile. Next size up aren't really that more expensive

Drill presses: No shop should be without them.

Mills: We have a mid size Enco model with digital readouts (DRO). A lot more useful than I thought it would be. Having something with a DRO it great for laying out holes. Makes making simple custom gear boxes a snap.