に不自由はさせない

won't let you go without

→ に
phrase Rare #38,547
won't let you go without A promise to provide for someone so they lack nothing essential, often referring to money or living necessities. The person being provided for is marked with に.
JA: 私が生きているうちは、お前に不自由はさせない。
EN: As long as I'm alive, I won't let you go without.

私が生きているうちはお前に不自由はさせない

As long as I'm alive, you'll never have to go without.

私が生きている限りお前に不自由はさせない

As long as I'm alive, I'll make sure you never want for anything.

私が生きているきみに不自由はさせない

You’ll never have to want for anything while I’m alive.