Congratulations! I can't wait to see pictures once he's settled in.

I think you have everything you need? I haven't had hamsters is a very long time and I've never had a dwarf hamster. I really don't know how necessary the vitamin drops are. He may be turned off by the taste/smell of them at first. I'd suggest weaning him onto them- maybe start with 1/4 the recommended dose and work up to the full amount.

One of my best friends has the most wonderful dwarf hamster named Bill. I know they can be nippy (I believe they are known to be even more nippy than "regular" hamsters), but if you handle him as often as possible then you shouldn't have a problem with that. I know my friend usually gives her hamster at least 3 hours out of his cage each day. He's the most gentle little guy I've ever seen.