I've just ticked over 1500 (directly recorded) miles for 2014. I reckon I could -probably- do 10k miles in 3 years without a job but that would be in London or equally easy surroundings (maybe some of the South Downs, etc.) and not carrying packs of supplies, etc.
Through jungles and war zones and ... no. No way. She's crazy. But in a good sense.