How much does your pet cost a month and/or yearly? And should I get a dog

First off, I grew up with dogs but never had to be responsible for them.

First few dogs were strictly outside dogs and i dont ever recall my dad taking them to the vet or groomers. They were loved big mixed dogs. Then one day we got a poodle, she went to the groomers i think every 2 months.

So Im looking to get a dog in bout 6 months to a year but it seems like owning a dog has gotten expensive and im not in aware of what it takes to have a dog in this day in age. 

My ideal dog

1. it will live indoors.

2. Dont need a groomer regularly or never

(3-4x a year)

3.kid friendly

4. Looking at a husky, Labrador or hubbys fave pit bull or rottweiler

So my question(s) is

1. Is it necessary to take your dog to the vet for a well check up or can i just take them when and if they get sick?

2. Should I still get a dog or no cuz of(blank)

Sorry if this seem like a dumb question but i havent had a dog as an adult and it seems like owning a pet has changed so much since i was growing up. I grew up with seeing dogs chained outside next to there doghouse.

Now i do have a cat who has only been to the vet once in the 5 yrs we’ve had her. And my sister and cousin give me grief bout it. Now my cousin and sister are dog owners and they take there dogs to the groomers bi monthly and to doggy daycare at least twice a week.

So with that being said when we get a dog my plan is to take it to the vet ONLY if sick, take baths at home and home train it.

Here is my fur ball who has seen a vet once in her 5 years and will be getting her bath this weekend