I really do not know how many books I own. What it shows here 2899 but that includes over 780 kindle books and I suppose ckbk books. But, I own much more than that because I think I have over 700 or so books in English language not counted in EYB as well as over 1000-1300 Japanese language cookbooks not counted in EYB. Fortunately Japanese cookbboks tend to be much thinner due to house sizes in Japan.
i have one bedroom I use as my own study and have half the books there. Other 50% are in entryway with big bookcases on the wall leading to our living room along with builtin separating two areas. And our house is not big compared to most houses in the neighborhood. I am slowly culling magazines though. I try to buy English language cookbooks now in kindle format due to lack of space but with Japanese language cookbooks, Amazon won't allow kindle books outside of prmary country.
My husband has never complained about my books because he loves all the food that comes out of our kitchen. Plus, he has built a separate structure behind our detached garage for his model trains and handmade layouts which is his passion. We both have our own passions and it works for us.