Sell the current building, take the money from the sale plus the 3m in the fund now and buy or build another, more modern building. The GLoT is like a figure head, often seen but seldom used. It's not like the MWGM and his officers are there daily, they are too busy traveling the state.
In fact, if you want to save money, curb their travels somewhat.
I am under the impression that the Officers travel costs are paid by themselves, not by the Grand Lodge. At least in Texas anyhow.