Without going deep into spoilers, the story is somewhat like a mix of
I Have a Mansion in The Post-Apocalyptic World
But with a system instead of the Isekai aspects and
My Girlfriend Is A Zombie
MC also has a sister who gets infected at the start but is only half transformed thanks to
her chronic diseases and a temporary suppressant MC gets from a hospital.
But because of that she is mentally a 7 year old and acts a lot like the Girlfriend from
My Girlfriend Is A Zombie.
But she can talk and does act on her own more somewhat more.
MC´s system can also do other things than build a shelter for a point cost.
Like repair/ upgrade / transform most items into superior versions/combinations
And he gets points for doing various things, everything from killing zombies to stealing electricity.
An example of this is :
When he combines a horse mask and some spray bottles with a lighter into a horse-mask that can breathe fire , or a knife into a boxcutter the size of sword/spear that also explodes.
The story itself is still decent but I recommend reading this ONLY IF you can stomach the translation.
The translation of the earlier chapters are barely readable and it feels like you are having a stroke reading it.
Which from what im told is mainly because of the original source,and not the translator.
But its a deal breaker for a lot of people.
Still giving it a 6.5/10, but if you can´t deal with some word soup every few pages it less then that.
Give it a read and if you can survive the first 10 chapters you might find you enjoy it anyway.