How to add Jobs and Pricings inside a Contact?

Say, for example there is a contractor named Khalid, and he will do your carpentry work at Rs.5000

You can create the contact named Khalid. And inside the Contact, you can add a pricing to its Carpentry Job.

Now the next time you are looking for a carpenter, all you need to do is go to the carpentry job, and check all the carpenters available, with their rates.