I read the "10 Reasons Not to.." and I just wanted to say, while it may be very true for others, I've never considered any of our 4 to be destructive nor willfully disobedient. Really. I expect some level of that since they are dogs first, but in the 14 years we've had very few items of value chewed on. That which was chewed on wasn't where it should have been anyway (they do teach you to keep a clean house). AND up until getting 2 puppies this year, our first 2 had full run of the house from 8-5 while we were at work. They do like to get into things, but that is just their curious nature. I do agree all need toys to play with and need a yard to run in (or an energetic owner).
Even walking can be up to the owner as they get older. Shamefully I must admit when we started having kids, the Basenji's (then 8 and 10 yrs old) took a back seat. We just didn't have the time or energy with a new born to walk them every day. We would go a week, sometimes 3, without walking them. Frankly they didn't seem to care and were just happy laying on the couch near us. Of course with a puppy you will want to walk them frequently (and you should with a senior as well).
However, I've also found they do well in pairs (though I've only had 4). We've nearly always had more than one so I'm speaking of someone with multiples. When we had only 1 puppy and 1 senior, I could tell the puppy was bored a lot. She was always looking for something to play with (not necessarily chew on). 6 mos later we got a playmate. With 2 they can play chase throughout the house and the yard and wear each other out. This morning for example, the 1yr olds ran outside together for 10 minutes then ran inside together for 20. Now they are on the floor fast asleep. I'm not suggesting 2, just a single puppy will definitely require a bit more interaction on your part… and be ready for another in the future!
If your are ready to make the commitment, as DDS said, the payoff is great.