Soft Rozena works pretty darn good with Korbel, I was really surprised. It is very soft, but it gives you good feeling on what are you doing with a ball which is a very good thing for beginners
I don't think so you will find something cheaper with the same quality and balance between speed/control/spin.
It is already dirty cheap on Aliexpress during special days like 11.11 (~$30-$35 per a rubber). Buy them during these sales days and keep more than 1 set of rubbers.
Hybrid lasts around 120-150 hours of practice\playing with good amount of tackiness. Do you clean them properly after each training session? Dignics 09c could last ~250-300 hours, but it is more expensive almost twice in comparison to DNA Hybrid.
In short, if people compare Hybrid with D09c, Platinum will be like D05 but faster with advantages and disadvantages from the speed. Platinum lasts a bit longer than Hybrid too