What I wonder is this: if only a few churches in each annual conference leave the psUMC to join the GMC, an annual conference will be able to absorb those costs. What if 100 or more churches leave? That is a lot of property and overhead for an annual conference to absorb. At some point, each psUMC Annual Conference will have more property than they can support. Will the local churches then be able to "buy themselves back" for pennies on the dollar, or less? Only time will tell.
They should leave in bulk and take prospective donations with them. There are more church buildings than congregations but they may just sell the buildings for the real-estate.