You can change and even revoke your living trust any time you wish. The decision is entirely up to you. A revocable living trust does not need a tax return of its own. In this way, you never give up control. The cost of your estate plan is both the cost of drafting the documents and the cost of distributing property to your heirs.
Wills are cheap to set up but expensive when they go through probate.
Initially, a trust costs more than a will, but a living trust completely avoids probate. While the cost to set up your trust is more than writing a will, the cost to distribute property to your heirs is much less than going through probate. But don't worry. The process of retitling assets and changing the names on bank and brokerage accounts is easier than you may think. Corporate trustees, such as banks, are also an option.