If a d 5000 has no focus motor it has nothing to do with older or off brand lenses that won't work. DX or AFS lenses have the motor in the lense and they are not good for when you advance. I know this because I just bought some new lenses that are AF and nikon brand lenses for my D40 and they don't have focus motors so I have to manually focus so it obviously is not just old lenses laying around that don't have the motor it is the new ones also. I am grateful that most nikon lenses are not capable of working with my D40 because it taught me how to do things manually. Do not buy a nikon if you are going to be stuck with one specific type of lense and not be able to advance. You can get a D90 that tons of people love and it focuses with any nikon lense even AF or DX and you can get them for a little over $700 now. I think it is body only. I have been looking for lenses and many times I find complaints about the lenses because people just bought a D5000 and can't use auto focus on their new camera. If you look at nikon lenses on amazon you see tons of these complaints. I am still using my D40 but I have upgraded my lenses and my next camera is a D90. I used a D5000 and I loved it but i would hate to be stuck with those DX lenses. I say get a canon or a D90. Sell some junk and buy the lenses for it. The 50mm is a good basic lense and is only $124 dollars. Here are some links to what I am talking about. D90 also does small videos. I also threw my DX lenses in the trash because the mount that holds it in the camera is plastic and they keep breaking and everytime I fix it I have to buy a $20 kit. Most any other AF lense is going to have a metal mount.
This whole post shows how little that you know about Nikons. I am an advocate for buying whatever feels best for each person (physically and financially) and am not a Nikon fanboi, but please don't spread this uninformed information.
First, the DX line of lenses does not mean that they have plastic mounts. Yes, some of them do, but DX is reffering to the sensor size that the lenses are designed for.
Second, the AF motor. Some people get really hung up on this but the truth is that there are only a handful (of newer lenses) that won't autofocus, but there are plenty that will and third party companies make plenty the the AF works on also. There are way more lens compatibility issues with Canon than Nikon anyways (if you want to split hairs)
Third, how do you break that many lens mounts? Are you throwing your camera around?
OP, go to a camera store and play with the different models and find one that works well for you.