That sounds like quite the monster! Congratulations, that's a pretty huge tank even by public aquarium standards.
I will warn you, I have had two horrible experiences when using Premier to move large tanks. Both were 220g aquariums on a slab, the first one was never leveled and burst two weeks later while I was away from home & the second time was when they removed that one and installed a new one, which they also didn't level even after I asked them to several times. I had to go get them from the truck and hove them come back and re-level the stand, and lo and behold, they didn't level it right and it also burst a year later. This is leaving out my bad experiences with the employees themselves, who stole plants from my garden and were generally unreliable.
I *do* know that a lot of people have loved their experiences with them, and all of this was approximately 4 years ago, so they may have changed for the better. But you never really know.
Whatever the case, I'm confident you can assemble a team to haul the tank inside! I'm aware of at least one or two other large tanks that the club helped install in homes, so it may not be a bad idea to ask here.
Have a great day and God bless.
