Hi,
I have been running an independent electronic lab for more than 10 years now.
Looking at your list, I would like to recommend you more in give more investment on your drill.
Get the cordless one if you can, it will make your life more easier.
I have a drill that lasted for 10 years now and it’s functionality is beyond whats going on inside the lab itself.
Multimeter I would recommend you get something that can also read capacitance.
I suggest also to invest in a good hands tools such as pliers and wire cutters.
For other prototyping, I have put some list here;