Anything and everything electric would be a [possibly] nice to have upgrade, but you can have great results with proper fleshing, the proper chemicals, 5 gallon spackle buckets, good [kept sharp] knives, and the time to 'break' using nothing but your hands.
5 gallon buckets are actually an excellent way to go unless you have more than a couple hides in one chemical step or are doing large capes. Key is using the right amount of chemical with the size of the hide and keeping the hide submerged fully in the chemical w/o being cramed so the chemicals have trouble getting to all areas of the hide.
Regardless of the tanning chemical [there are several good ones] you go with, you will find that salt [and lots of it] is something you need all along the way. I buy it in 50 lb bags from the feed store for about $4 a bag.
If you find that you are into tanning, the first upgrades [my view] you would want to consider are a tanning drum [used to break the hide... not tan it] and a wheel knife for fleshing and shaving thicker hides.
I really do recommend you go simple and focus on fleshing, fleshing, fleshing, and the subsequent steps. Don't go for volume [to start]. Go for consistency and quality and then once you are comfortable you got them then you can look at increasing volume and the tool upgrades.
Did I mention fleshing? If you don't get the fleshing right it affects everything else. It takes time and lots of practice.