Unless you belong to a specific tradition or wish to emulate such a tradition, there are no rules to your practice. If it is for personal use and is not used within your system, it should be personal to you. In my opinion tools should reflect a practitioner's personality and so if you don't want a crystal, don't have one. If you do, simply add it when and if you get time and acquire one.
A wand is not necessary at all. I have made several, I was born with fingers before I gained the knowledge to cut a branch!
My altar has two candles, a charcoal disc burner, a incense stick holder, and my ritual dagger. I have found that witches of old simply used what was on hand, you don't need fancy, special tools, if it works, it works. Fancy tools are to please the ego with extravagance, or for ritual work whereby you attune the mind to certain forces which are concordat with the programmed nature of the tool being used.