New needles are not going to save you from catching something unwanted. It is a hot environment, and difficult to keep things under control. All the gear needs to be autoclaved to make good, from tubes to grips etc. cross contamination is the biggest risk here, people don't get it. They put their gloves on and then go ahead and start scratching themselves or moving furniture opening and closing doors etc and think because they have gloves on they are not cross contaminating anything.
Think of it like this, a client is getting tattooed, a customer walks in, he take the attention of the artist for a moment to fill in an appointment in his book, he keeps his cloves on which has traces of your blood on, then comes back to work on you. Later that day, he is working on another client, and another customer walks in to make an appointment, again he is distracted and goes to fill in the appointment in his book, he still has his gloves on and opens the same book that has traces of the previous clients blood on, he then comes back to you and start to cross contaminate you with the previous client. I have sat and watched many artist here and they all do it, it seems like none of them understand anything about the importance of changing gloves whenever they leave the client, all of them. Maybe it is the cost of gloves here, maybe it is the ignorance, but it is dangerous. That's just for starters.
As far as treatment goes. I got Hep C through a tattoo and had to undergo a years treatment of daily injections into my stomach to be rid of it, and even with that treatment it is not a guarantee that it will be successful. So be careful, the DR is a terrible environment to get a tattoo, even healing is difficult because of the humidity, you will lose a load of colour besides the other issues of a constantly hot saturated wound.