One nice thing about plain ole Kodak fixer powder is it works. One other fact is you are paying to ship from one side of the marble to the other, so powder fixer and developer (Diafine) might allow you more product per same shipping cost as doing liquids.
I am certainly blessed every time I smell fixer, it meand I am doing what I enjoy.

Start easy, learn a lot and love doing it, even if fixer does smell like fixer... btw, it is fixer.