I would suggest you look into professional scanning services if you are intending to submit them to libraries, they can be a bit picky on quality afaik.
I have been working my way through about twenty years worth of film DIY and I can tell you it is NO small job.
I am running a old ACER Scanwit, I bought in Y2K, I have given up on, numerous times and returned to as many, ad computer tech has leap-frogged!. Windows 7 doesn't like the 32bit SCSI card, so it's running on an older XP computer almost as a dedicated scanner rig, which finally lets the thing breath at its highest quality settings and delvers approx 9Mpix 64-bit colour, scans at a rate of about 5-minutes a frame...
Then, when you have got a strip of frames into Photo-Shop or similar... you may start restoring them.... dust motts are an occupational inevitability, scratches, fading, damage, drying marks etc etc etc... silverfast has a little auto-restoration in it, but haven't managed to make it work yet....
BUT the point is, from picking up the box of slides/negs, to having presentable digitised images, you could spend the best part of a whole week-end on just one or two films worth of pictures...
And then risk the wrath of the photo-library over size, format, quality etc....
For 'speed' have been using a little USB web-cam-scan.. much derided, they chuck out about a 12Mpix or 14Mpix file, inflated with a large degree of interpolation, that is pretty mediocre, but 'OK' for web-display... but, it IS 'quick' I can digitise a roll of film and touch up the pictures from it in about an hour or or, to have something to look at, ad decide is need or want a 'better' scan of anything..
Before making big investment in more dedicated hardware, or time, might be a worthy £25 e-bay toe-in-the-water
BUT if you want to submit to image bank, I would check very carefully what their requirements are, and with a large number to digitise, a pro-service, may be the better route, if oly to actually see the job 'done'! (Which is another warning; working 'as and when', I am constantly frustrated finding keeping track of scanned and unscanned! Takes more 'space' more time and more organisation that yu would credit!)