Turtle hard shell wax not liquid, though it requires a little more effort
1400Rs for Megurs compound you are talking about? Well i saw the same price on most Pakistan sites, but on amazon the price is wayy cheap https://www.amazon.com/Meguiars-G17216-Ultimate-Compound-15-2/dp/B001O7PNNM
I will try to find if it is available cheaper and let you know
Anyways i am in same situation i will do by hand because Rotor is too costly. And professionals (carbographics) are charging 7k for compound + sealant = 12k which i think would be out of budget for an old car..
Here on pakwheels experts say this when i asked about compounding by hand
But my one friend compounded using hand (meguirs ultimate compound) and results were pretty good on black car. but the one who did beige passo results were normal. So i will try by hand after Eid it is in my to do list 
I will ask my friend about the quantity method and time required after few days so it can be helpful for us