The thing is if he gets elected while he still owns his companies they get put into a trust-hold sort of thing where someone actively maintains it while he does presidency work meaning he still owns them but doesn't fully control them, this results in him earning less money than he would if he just didn't become president and continued to focus on his own businesses, also, he would have to pay taxes (which I'm sure he has been the past few years).

Edit: Seems like while that's a law, it doesn't apply to the president, but still there will definitely be pressure for him to hand them over and he has talked about handing management over to family/friends.

I believe he wants to make America better because if you see any of his videos from years ago he's clearly against being a politician unless he feels America really needs help, if you look into why he wants to reduce tax on the rich his theory actually makes sense.

The problem is being wealthy everyone will always just assume he's going to do the shadiest things possible to benefit him which is a weak argument for being against him because Clinton is the same way.

From an outside view (I'm Canadian) a lot of what I see in this election is "I'm voting X because X and Y are both bad but Y is worse" it sucks it's come to just having to settle with who you think is the lesser evil candidate.

And about the whole him not believing in climate change, neither did our PM we had for years, it isn't going to ruin the country and he's still going to focus on fixing the environment because it's an overall boost to the economy.