RTW Ticket or Booking Flights Point to Point?

One of the difficult parts of planning a yearlong adventure like this has a lot to do with how much we want to commit ourselves in advance.

Do we book every flight throughout the year?  Do we wait and see how we feel in a certain place and then decide to stay longer or move on?

Early on, we did research about the pros and cons of buying RTW tickets vs. point-to-point flights and decided that we'd rather air on the side of winging it than have every leg of this trip planned out.  

The benefits of this strategy are we get real freedom and flexibility, something we're both very excited about in contrast to our current (very structured) lives.  The downside is that tickets book up, and we run the risk of losing flights that we could have otherwise book with miles.

So we're trying a bit of both.

We didn't purchase RTW tickets, but we're not completely winging it either.  

One of our biggest legs will be getting from Peru/Bolivia in South America to Cape Town, a ticket that can easily cost $2,000 one way per person.  Luckily, Nate has been keeping an eye out for award flights that could get us to where we need to go.  

So, while we'd love to hold off and see how things go in South America, today we decided to book our flights to Africa.  Here's what they look like:

La Paz, BO (LPB) > Lima, PE (LIM) Lima, PE (LIM) > Sao Paulo, BR (GRU-Guarulhos) Sao Paulo, SP, BR (GRU - Guarulhos) > Johannesburg, ZA (JNB) Johannesburg, ZA (JNB) > Cape Town, ZA (CPT)

La Paz, BO (LPB) > Lima, PE (LIM)

Lima, PE (LIM) > Sao Paulo, BR (GRU-Guarulhos)

Sao Paulo, SP, BR (GRU - Guarulhos) > Johannesburg, ZA (JNB)

Johannesburg, ZA (JNB) > Cape Town, ZA (CPT)

Nate put his travel hacking knowledge to work and got us these tickets on business class for just $161!  Pretty amazing.

All together, this will be two full days of travelling, and a whole lot of sleeping in the airport.  Luckily, the one thing we do have on our side is time.

What do you think? Are we crazy for booking this?