Long term visit visa for my mother

Hi all, I am going to apply long term visit visa for my mother, she had 2 years visa last 2 times. I just would like to ask about bank statements from my side. Me and my husband both are self-employed and both have money in our business accounts. I have savings and my husband receives salary in his business account.
Will this be ok to use those bank statements? Also how much savings should we have for her visa as we are going to support her visit.
Many thanks.