You may not have specific positions in mind, but if you don't have a rough idea "here are the kinds of things my startup will need to do in the near-to-medium t

You may not have specific positions in mind, but if you don't have a rough idea "here are the kinds of things my startup will need to do in the near-to-medium term" and "this is roughly the amount I can afford to spend annually on positions I haven't yet hired for, in aggregate", then that doesn't sound like a company that's got a good future to me.