I would not. But let me qualify this too.
I don't think it is too much money. I would likely pay it for true quality hunting.
My issues are two fold - a 4o is too small and you will not be able to hunt it much as you will push out the deer you paid to hunt.
And a 150 inch deer is pushing the limit of how big some deer can get. All deer will not make it 150 regardless of how long they live. To me, 150 is right "next" to the border of world class. Not world class but getting there. So you may wait a long time - years to shoot one. There is a lot of beautiful 120, 130, 140 class deer that will make us very happy. We all don't have the time to wait for 160s, 170s, or 180s. Sure we would love one, but be realistic.
And one more caution, I would be very careful sharing this land with friends as you suggested. Big deer, are few and far between and can (not always) make men nuts. They ain't worth losing friends over.