You guys have to understand one thing. When Portugal started it's overseas expansion in 1415, the total population of the kingdom was between 1 to 1.2 million. Therefore, any effective colonization was a humongous human resources drain. Due to that, many foreign settlers were even used, especially small groups coming from France, german states or what would later became The Netherlands. This became especially important in the atlantic islands (specially in the Madeira Island) when Portugal tried to start a sugar producing industry which, eventually died when Brasil became the main main supplier of that product.
Settlement efforts were also made using a mixed marriage policy in order to, establish in the long term, populations that would be loyal to Portugal. The result of that can still be seen today in Malaysia or India.
Also the main objective of the overseas expansion was to reach India and other spice producing areas like the Molucca Islands. Everything else was pretty much scenery or small areas where the portuguese fleets could replenish food and water until Brasil started to develop.