What document scanner do you recommend for many filing cabinets worth of scanning?
If the only issue with your existing scanner is that it needs to be used by the rest of the office, then schedule the scanning when the rest of the office isn’t there (late at night, weekends). If that won’t work then I’d see if it wouldn’t be cheaper to outsource the scanning rather than pay an employee + buy new hardware for what sounds like a one-time job.