The best areas for seeing macaws are usually remote from towns and cities. This is not a problem, unfortunately sometimes added expense. There are few places in the world inaccessible these days. Conditions may get a little primitive as you leave the towns. Take careful note of any seasonal rains, macaws don't like the rain.
Unsealed roads are often impassable after rain.
The most expensive part of the trip will be the air fare. When you arrive in most South American countries you will be rich. Hard currencies go a long long way. This means someone is attempting to control the economy. There are lots of poor people.