You must include your wife and child on your application, but you can specify that they are non-accompanying. It doesn't save you any time or paperwork as you still must provide full details and documents about all of them. If you don't include your wife and child on your application you can NEVER sponsor them to come to Canada. Be warned!
If you list them as non-accompanying, they won't get visas and after you land and become a PR you can sponsor them later. It's easier to just list them as accompanying and bring them with you, but if you have a good reason why you don't want to (and you must explain to CIC why), then go ahead.
I don't understand "once I get my application charged I will apply for my wife and child." One way or the other you have to pay for them, you can't avoid paying by listing them as non-accompanying and bringing them later.
Also note that whether your wife and child accompany you or not, you must prove sufficient settlement funds for all 3 of you.
Good luck.