bros / sis,

i intended to buy a sub-sale new double storey terrace but was abandon for a few years until early this year only got the CF. Problem is I saw every houses do have some cracks here and there on the wall. some even can see the top door frame uneven. my question is how serious are these cracks? I've checked the exterior houses seems not like settlement issue. problem is former developer Talam already bankrupt so nobody will rectify it. such issue is it normally will need to demolish the particular wall section and rebuild?
is it advisable to purchase and i'll need to search for the best/minimal problem condition house there is?

thanks
Happy New Year