Getting around Portugal is relatively easy and affordable. Train rides are the best option for long distances. Car rentals are also an option, but parking can be challenging, and Portuguese roads are not always easy to navigate. The costs for transportation will vary based on your chosen mode of transport.
If you have more time, you can explore other regions of Portugal, such as the Azores or Madeira islands. Or if you have less time, consider focusing only on Lisbon and Porto or one region. It's also important to note that Portugal is a popular tourist destination, so be sure to book your accommodations and activities in advance, especially during peak season.