He doesn't want Trump Organization to go out of business. If taxes are high then Trump Organization will have massive overhead which he will have to charge higher prices to make profit. If there is massive inflation then Trump Organization will also go out of busthe better Trump does with fixing the economy the better his business will do. His business sells ordinary products to ordinary Americans. Its not like he owns Lockheed Martin. His business isn't a contractor with the US government so he is going to do what he can to help the American economy for ordinary people. So he will lower taxes, regulations, and inflation, etc. He also won't start a war that will devestate the economy either.

The only ones complaining about his business interests while in office are people who want big government. Its no coincidence either.