i am sure most would want an entry team to use a bullet that is less penatrating (as possible), so shots wont hit their sleeping kids on the other side of the walls...
Our SWAT team used 35 grain Hornady. Their logic is that they would rather risk return fire from a suspect than to have a round overpenetrate and kill another officer or non-combatant. The count on their skill, superior numbers, and body armor to protect them long enough to put enough rounds on the threat that the threat is stopped. I am glad I am not one of our SWAT officers because that seems like a very risky bit of reasoning.
Getting back to the OP, I don't believe there is a single round that I would consider good for self defense that would be "safe" inside a trailer park. If a round is going to sufficiently penetrate a human, it is going to easily penetrate the thin skin of most trailer homes. Unless the round hits some sort of heavy steel support or wood, the thin metal skin, light insullation, and interior wall material cannot be counted on to disrupt the round sufficient that is won't hurt anybody on the other side.
An article several years ago about specialty handgun rounds that boasted not over-penetrating had results that you likely would get with the rifle ammo. Based on their tests, a shot that did not hit their simulated human first, that just hit the walls directly, had no problem overpenetrating interior dual course drywall and some a second set, or about what a trailer exterior wall would be like.
Round that overpenetrated their "human" did not then penetrate drywall.
They noticed that most other hollowpoint ammo performed comparably if passing through a torso thickness.
In short, the reduced risk of overpenetration meant nothing if you missed the body of your target.
You could go with extremely light ammo like our SWAT guys and reduce the risk of harming somebody on the other side of multiple trailers, but otherwise if you want a round that will penetrate will enough to be more likely to have the desired effect, it is going to be a round that probably isn't trailer park safe for missed shots.