Sounds like a Hammond B3 or the C Series. Piece of cake to move those with 4 people.
If too big, don't hire an outside company. Rent something like a JLG lift for a half day. They also have high lift fork lifts. Don't forget to rent heavy duty straps.
Recruit some people, tell them this will guarantee their entry into heaven, save money and have fun.
I have moved hundreds of large organs.
BTW, your priest sounds pretty cool.
Oh he is. He's great.
The Choir Director, who I know, ahem, quite well, wants to take this opportunity to move the organ to BUY a new organ. I know nothing about organs but this one I am told is old, ....it's been in the church since 1960 if that helps.
Thus we might align actually buying a new organ instead of re-moving that old one. $100,000 I am told to buy a new organ.