about use KXs to do 3bet

BTW it is cash game, 1-2 US dollars homegame

It depends on the pot size, your position, your stack size, your read of your opponents.

auto betting Kx is not a positive play in a home game

On the button, with just the open and no calls, I might 3bet either of these hand types to make sure the blinds fold and I get heads up.

I say might, because I also have to feel like I can outplay villain. I’m not trying to hit my hand, I’m trying to run him off his.

Otherwise, I’m not playing any of those hands

Especially multiway
People think they’re priced in, but the reality is with more people you will lose more often and when you do hit your hand, you won’t win enough to make up for all the times you miss.

Might not be the answer you want, but playing these hands is a losing strategy. They mostly need to be mixed in as bluffs.

When you play Kx you should play hard preflop if you're opening or in position not facing a raise.

As already noted, it depends on the proclivities of your opponents. If you think you can get HU with the opener, then a 3bet against a passive and weak player might achieve this aim.

However, unless he has opened with Qx or lower, (Jx or lower for your Qxs), and doesn't connect with the flop, it's almost essential that he'll have to fold for you to win. If you have to push money to get him to fold, the times he calls your last bet might well wipe out the smaller wins the strategy will achieve.