Just venting and looking for support

Hello, im(F18) writing this just to get it off my chest as i cant talk about this with my friends out of fear of them calling the police lol

(I wont go into details of the abuse in this post as i dont want to recall it)

Okay im from a big family(9 kids) and my father has never really been there as a father figure, he just provides money since my mom is a SAHM

He has been abusive our whole lives, but he would be away all the time except some weekends so it wasnt happening that often as we had almost no contact with him

Basically, the last 2 to 3 years his business has been failing resulting with him being at home more and him being more abusive

Most of the time its "just" emotional abuse, yelling, manipulating, insulting etc., but him being physically abusive isnt such a rare sight along with that

He has made all our lives so miserable and its so draining being in the same house as him hence ive been thinking of moving to my grandmas house, but im worried that if he were to throw a fit and start beating someone that none of my sibling would react accordingly except me

Now, he is most abusive during the summer when were all on break and at our summer house so i tried to tactically come at a time when he would leave and go back home for work, but sadly he decided to stay a couple more days

I am currently on my way there (my mom is driving) and am on the verge of tears because i am honestly scared of him and am thinking about taking the next bus back home after we arrive

Last summer, he beat me up and we went for a drive and had a talk about how hes failed as a father and how his business is failing etc, he gave me just a bit of hope that he'll get better during that conversation but of course he just got worse

And now i was talking to my sisters about how if he starts being hella emotionally abusive and controlling and manipulative that i will start arguing with him and, if it comes to that, i will not hesitate to call the police this time if he starts getting physical with the abuse

They told me im crazy and that i should just suck it up and ignore it but i told them that its super difficult as hes most abusive to me

One extra problem is that hes our only source of income and we would probably be on the streets if something happened to him

Now i want your advice on the matter, should i just ignore him as much as possible and avoid him at all costs, just do whatever he tells me to without complaining or should i try reasoning with him when hes throwing a fit etc?

And also, would moving to my grandmas house be a good idea? Im not sure if leaving my younger siblings and mother with him in the house would be the smartest/safest thing to do?

I just feel like this is such a helpless situation and i hate it and i want to leave this house but i would feel insanely guilty and selfish if i did so it feels like hell lol