Kanye West and Kim Kardashian went through emotional turmoil during their recent home renovation, with Kim complaining she was footing the gigantic bill herself.

Our sources say during the final taping of Khloe's talk show in April, Kim was grousing that they had sunk $8 million into their Hidden Hills remodel and it was all her money.

We're told the renovation costs swelled to $10 mil. Our sources say the main reason they sunk so much into the $20 million estate ... Kanye couldn't make his mind up. He would order a change and when it was completed he'd take a look and tell contractors to rip it out and do it another way.