"When you have no idea how long this adventure might last, and you don't yet have a great income, it is pointless to move to another country," Ericsson told F1 correspondent Heikki Kulta.
F1's famous 'Super Swede' Ronnie Peterson, twice runner-up for the championship before he crashed and died in 1978, also harked from Sweden's Orebro county.
Ericsson will drive for the backmarker Caterham in 2014.
"We've done everything possible to prepare," he said, "but I doubt that anyone has been able to prepare completely.
"All I know is that I am ready and am able to drive very fast."