Didn't we carry the house from where we defeated it back to where it was?
Beyond that, it is not a large house, getting a truck and just driving it away should not be all that difficult if we ask Alise for help.
In fairness, it is
probably truck-transportable, for 'DANGER, WIDE LOAD, CLEAR THE HIGHWAY' standards of truck-transportable. Though we'll get attention doing that.
I maybe shouldn't be overly worried about the part where it took several Senshi to move it. After all, it's much bigger than the Senshi are, so just the issue of balancing the load and keeping it from tipping would probably require at least one Senshi at each corner.
And considering it is loot we can vote on, i am going to just assume that some way of moving it is going to come up.
You have a point. But that doesn't mean that the way of moving it will come up inevitably, or quickly, or without us having to take further actions. Nor does it mean that the act of moving it won't attract attention to our
possession of the house, nor that we won't end up having to leave potential enemies with a lot of clues as to where we took it.
MCAT has the same problem, but MCAT doesn't have secret identities to worry about and can afford to at least
monitor a property at all times.
How would MCAT have moved it?
Leaving it in place is an option but that poses some security risks, even if they place a 24/7 guard.
Of course they might just decide to just break it so nobody can activate it and cause however much destruction would happen before Senshi can be called in to stop it.
They very well might.
On the other hand, they might well decide that the risk of it being stolen is manageable. MCAT has enough good combatants that it can probably secure a few locations against infiltration-level attacks by the IMO. A full dress "all of you against all of me" attack might be different, but I suspect lone MO agents can't reliably cut through what they face at MCAT's best-held positions. Furthermore, an IMO mage activating the house without authorization is likely to be its first victim, so it would be unlikely to go on an effective rampage likely to harm MCAT as a result.
The biggest threat is
Faust stealing the house, but Faust is a third party in the Onogoro-Japanese civil war, and there is no obvious reason to assume he wouldn't simply retreat from Japan entirely, at least in the short term, rather than becoming an immediate threat.