Hi,
Just wondering, are you likely to be playing these recordings from vinyl in future, or just using your digital copies? If you won't be playing the vynil, after making the copies, you could consider just hiring a DJ turntable for a week or two.
If you do this, make sure the tone arms are in good condition, and buy your own good quality cartridge.
You can get some advice about turntable setup, and cartridge characteristics from their suppliers. You won't need to have a lot of anti-skip, etc, as you probably won't be doing any scratching.
Another option would be to spend a bit more on the turntable, with a view to selling it once you have finished.
Peronally, I love the sound of vinyl, as it really has a very warm character, to my ear.
P.S. They're not old 78's are they?