Hi! Welcome to the forum!
I agree with what Dan said.
One thing I'd suggest is that, if at all possible, you should visit and spend time with a basenji (or two or three…). While the reading helped a lot when I adopted mine, I really wish that I had met a few. It gives you a different perspective than just reading. For me, it was one thing to read that they were destructive, but another thing altogether to see just what my bundle of joy was capable of. I'm not sure, but I think most responsible breeders will let you visit their basenjis (or encourage it) if you are interested in getting a puppy from them. Hopefully one of them will chime in.
On fences, and this is just my experience with one basenji (a 4 year old rescue), I think it's a bit tricky. Like Dan said, all B's are different. For almost a year, we had no problems with our chain-link fence (after basenji-proofing it, that is). Cody's a climber, but someone was always outside with him, so we were able to pick him up before he made it over the fence. He didn't try to climb it very often, though; it was only when the neighbor cats taunted him from the other side of the fence. Then one day, he was startled by a low-flying helicopter and he started jumping it. He jumped and cleared a part of our fence that is about 4-4 1/2 feet tall... more than once. When he realized that he could do it, he continued to jump it whether he was give a reason or not. Thankfully, we have since fixed it to where he can't, but I am all the more vigilant because of the experience. Now I wish I had seen the fence rollers, though, that's a cool idea.
As for chewing, I have learned that diverting his attention is the best way to get him to stop. He seems to go through cycles where he will/will not chew, and thankfully he doesn't do it as much anymore (because my wardrobe was starting to severely suffer at one point despite all my efforts to keep my clothes away from him). His favorite things to chew include (but are not limited to) hard plastics, pillows (to de-fluff them), anything with fluff on the inside, bras, jeans, mittens/gloves, the molding around doors and windows, carpet edges, the occasional mini-blind, and thick hems on clothes. I usually trade him a raw bone or a rope toy for whatever he has, like if I see him try to grab a pair of jeans, I'll give him the rope toy, but if he starts to chew on hard plastic like on our vacuum cleaner, I'll give him a bone, kind of like almost an even trade depending on his "chewing needs" at the time.
I hope that helps. Good luck and keep us posted!