While I can’t comment on Farnborough per se, outside of London, things are different in as much as far more people drive and use their cars for every journey. Many drive to the station if they’re commuting into London (or elsewhere) for work. Given the reliance on cars, I don’t think being a 20 minute walk from the nearest station will necessarily be a hindrance.
Would it be feasible to take a 6 month contract to see how things work for you? Or maybe even consider touring to test the water first?