Frankly speaking you don’t need a consultant for Canada PR bcz u can handle everything all by urself and moreover there is loads of data available online.
What are your scores in the modules of IELTS? If u get 8 in listening and 7 in the remaining, then that will give u a very good score. A consultant also can do nothing if u don’t have a proper score in IELTS.
Still a consultant can do nothing extra… Though they claim to be having some business secrets to get u PR inspite of ur low score. U can try PNPs… Or try getting a job there.
Consultants are purely just for documentation and we are better than them even in that aspect, unless urs is a peculiar or unique case and go to a really famous consultant. Even he will advise u on how to proceed with ur case but won’t help u in securing an ITA.
Anecdotally, it takes somewhere around a year to sponsor a spouse. If your wife has a degree and can get a good IELTS score it would help you get your CRS points up. If she has Canadian Work Experience, there are additional points for that too. With your current score, PNP might be the only option for now. If you add your spouse, you may be able to add a maximum of 40 points based on their education, work and IELTS.
It would be easier to add your spouse to the application now. Once you receive your PR, you can go ahead to Canada first and your wife & kid can join you after a few months.