Have you found a good source for the inductors? Apparently, the originals are obsolete.
I try to use NVRAMs when I can, but the coin cell and remote battery holders are more cost effective. Also, in games that use the RTC, like TZ, a real battery is a requirement so the clock displays the correct time.
I have a few boards like this that I have been hanging on to to try and repair at some time.. but man, as you show, it's a lot of work. Also haven't found a cost-effective source for the little yellow caps below the battery holder. At a buck or so apiece, that adds up quick!
I rewind the inductors with the same gauge insulated wire as the ferrite rod has always been reusable so far.
