Does the State of Utah have finances to support the land in question? The answer is NO.
I don't see how that can reliably be assumed to be true, nor why it is even relevant. This is land which rightfully ought to belong to the state of Utah, or to individual residents of Utah. Does the federal government have the power to seize property, either from states or individuals, on the basis that the owner of that property is alleged not to have the finances to support it? Where is this power enumerated, in the Constitution?
If Utah doesn't have the finances to support all of the land that it rightfully owns, then the correct remedy is for it to sell that land. Let people build houses, and stores, and other facilities; let people live on that land, and work on that land. Let the land be used in the way that maximizes its value to humanity.
There is no good reason,and no legitimate reason, for the federal government to be hoarding for itself, such large amounts of valuable property, and preventing that property from being put to good use; and certainly no excuse for the federal government to not even offer just compensation to those from whom this property was stolen.