"If you already own two houses and you find yourself only able to afford to run one of them then you keep the one that will best meet your future needs at the most reasonable cost, and preferably the one where the roof doesn't leak, the heating and water work, and there are enough bedrooms."
If you are making a basing decision based entirely on cost, then you aren't being especially strategic; tactically short-sighted one might argue given the costs of addressing any shortfalls are dwarfed by operating and relocation costs that would otherwise be incurred. Not least the investment that will have been made to get this far.