I take photos of bridges, of people who depend on them for a livelihood, shelter etc., for example Howrah Bridge in Calcutta. Close ups, street portraits and some from a distance all with a 5D II. I managed well with a 28-135 f3.5 - 5.6 IS and picked it up new in Jessops in London 12 years ago for GBP300, I think. All the reviews about this glass slam it, but for my requirement and skill level and budget it was perfect. I now use another lens (70-200 f2.8 IS II) but do take it out my old lens now and then for old times sake.
Buy something modest, as suggested elsewhere, try it out and then decide since especially, in your locale, USD2000 is a king's ransom and can bring immense benefits if your pictures move people.
I'll be in SP in August of next year and maybe we can meet up and exchange notes!