What happened to all the money and house of Chavans??

……and yeh Sonali and family kahaan gaye?

Pakhi didi didn't took proper care for the business. So because of that they were in huge debt.

So they lost their house and everything to clear that .

In one of the final episodes you can see Omi kaka has pulled Mohit and Sonali out first. Might be it represents they have left Chavannis and went away.

Omi Kaka and family ran away on a luxury world tour to escape the generation leap and Chavan’s poverty