Auto dealers can indeed register and title vehicles, and issue plates and charge a fee for this.
If I am the owner of a used car lot and I choose to register and title the vehicles on my lot myself, to they all have to be in my name or can I have one of my employees do this for me on occasion?
I do not intend to register every vehicle myself.  I want this to be something my employees can do and to be able to charge my customers a fee for this.
Are you intending to become a full-time auto dealer?
I am indeed, yes.
If you are an auto dealer you can register and title the vehicles, issue plates, and charge a fee for this and the registration does not have to be in the owner's name, or for only one person.  You can have the registration written up in any manner that suits your needs best.
What do I do if I want to renew a registration online?
If you want to renew a registration online, you can do so and print a 10 day document to use until your new registration arrives in the mail.  However, you cannot do this if your vehicle has been altered or stretched to increase the number of passengers or if there are other special circumstances.
Where do I need to register vehicles owned by my business?
You must register any vehicle owned by your business at a DMV office.
Where do I place my registration sticker?