No ground in old building

Hey Amsco here is the quote the electrician gave me. There used to be a hot tub out back but the 50A service is still there. The guy is going to install a sub panel and change it to 60A if the wiring allows and run 2 20A dedicated lines and possibly another for a mini split off it. He then is going to ground my current dedicated outlet as well. There are a couple lights in his quote for a hallway that has no lights. I really have no gauge as to what is normal, can you take a quick look (anyone else feel free to chime in)

It’s totally ok if you don’t know as well, I thought I would at least ask!