Reynard
Emperor Mongoose
Throughout history, resources become more commercially viable as the technology to extract, process and transport them make costs lower. Development of rail was a prime factor for the Industrial Age. Exploitation of intraplanetary resources is just not possible with todays's space technology. Far too weak and slow. Colonization is very difficult because you need a fast, reliable method to get supplies to those fully dependent facilities.
A form of terraforming Mars is exploitation of local water and gases frozen or trapped in the ground. If enough can be extracted, you could have agriculture areas. Domes could be a good choice for access to free solar energy. Your next problem in terraforming , however, is soil. Mars doesn't have nutrients meaning a LOT of that needs to be transported, very costly. Even aquaculture will need imports. The soil may also contain toxins such as heavy metals.
With all that, Mars' first outpost/colony mission could research into developing local food.
A form of terraforming Mars is exploitation of local water and gases frozen or trapped in the ground. If enough can be extracted, you could have agriculture areas. Domes could be a good choice for access to free solar energy. Your next problem in terraforming , however, is soil. Mars doesn't have nutrients meaning a LOT of that needs to be transported, very costly. Even aquaculture will need imports. The soil may also contain toxins such as heavy metals.
With all that, Mars' first outpost/colony mission could research into developing local food.