Testing Wine for Home Wine makers

I’ve been making some wine this year, and the local wine making shop has a service for testing the wine at various stages (ph, sulfites, etc.), but I’m thinking…

Isn’t there some kit I can buy and just do this myself? I quick google search yields many alternatives. Anyone have experience with this? Can you recommend a good test kit that is easy to use and accurate enough for home use?

Thanks in advance!