Good brush routine
Getting your dog used to brushing is a good base of home grooming. Choosing the right equipment and technique is something you should discuss with your groomer to help you best look after your dogs coat. Start brushing when your dog is a puppy in their down time and with a few treats in your hand.
Washing at home
Unless you have a salon grade blow dryer I wouldn't recommend washing a Cavy at home. It'll take a long time to dry them, especially the ears! A good brush out will remove the dander and dirt but if you really have to, rise the feet only and leave the rest to a professional groomer.
Professional grooming visits
This will depend on weather you're leaving your cavy long or short. If you're looking to grow out their coat long, a daily brush routine is a must. And visits to your groomer every 4-6 weeks. For shorter cuts normally a visit every 10 weeks does the trick. Speak to your dog groomer (Dog Hub grooming in Raheny) about what will work best for your and your dogs lifestyle.
Teeth
Start checking your dogs teeth when they're still puppies. Depending on what food you feed them, dry or wet or raw, check regularly for signs of any build up on their teeth. Brushing their teeth a few times a week should help to prevent a big build up. And if you're a fan of supplements, I use a product called "Canident" for my dog (Irish Terrier) and it works amazingly well to keep the tartar at bay!
Flea / Tick / Worm treatments
Make sure you check your pet regularly for ticks and any signs of flea debris. There are many ways of keeping your pet free of any parasites so find a solution (chemical or natural) that works best for you and your pet.
Vet visits
It is advised that you visit your vet once a year for a general health check. Even if your pet seems healthy, they're professional vets for a reason and might spot something you missed.