The OP’s original question regarding turntables, etc. is dependent on several unstated issues that should be resolved:
[li]How much have the stored LP’s been played over the years and what condition are they in (other than surface dust and grease)?[/li][li]Is the OP looking for “low-fi” recordings to be put on an iPod or for “hi-fi” recordings that can be played back through a good audio system?[/li][/ul]
The point of the 1st issue is whether or not the recording process will need to be concerned with eliminating pops and other LP audio artifacts, which to some extent can be addressed with the software used for making the transfers. Also, as previous posters have mentioned and as discussed below, the quality of the recordings desired may influence the amount (if any) of compression applied during the recording process.
The 2nd, and more important issue, regards the quality of the equipment purchased. Like most things in life, the quality of the turntable, cartridge, and phono pre-amp will determine the quality of the recordings made. In most cases, the OP will need to spend more money depending on audio expectations. The cost of a good quality cartridge can be as much, or more than, half the cost of the turntable itself (meaning the platform, drive and tone arm).
I’m not sure that using a recording studio would be economically the best choice since the OP indicates he has an immense collection, which I assume would mean in excess of at least 100 albums.