You need a better reason than that to set up a trust. A document to express one's desires in regard to life support systems should he or she be diagnosed as being terminally ill. It has become, also, somewhat of a standard practice to execute one of these documents when preparing one's will. This is a court supervised process designed to oversee a decedent's affairs. Following the proper procedures ensures that your property goes where you want it to go and that there are no unresolved problems regarding title.
Costs are insignificant in the grand scheme of things.
In addition to the probate court costs, an advertisement or two in the newspaper might be required, plus attorney's fees. This is not a Living Trust which you establish during your life, but is a trust which is included in your will and only comes into being at the time your last will and testament becomes effective. Many reasons may exist for such a trust. A common reason is to name a relative as trustee to manage assets for the benefit of your children in the event both you and your spouse are deceased. The basic concept is that you give someone property and trust them to do something with that property.