They went in a team, if for oneself to go like that, hard and dangerous. Saw the landscape of Alaska, jaw drop! Too bad, local tour dont move so deep in there.
Back to topic. For me, I will save up 10k or more and then rent out my flat for a family for 2k+ for 2 yrs contract. Then I just travel alone and back in 2 yrs to recharge. Off again in 6 mths and back in 2 yrs etc... If do for 10 times, that will be 25 yrs in total! haha!