I would check you might be surprised in a good way. I installed one in our last house had to cut a 3'x3' hole in the floor pour a footing, shore up up on both sides, put in the new beam, done. really didn't take that long. The worst part was the mess from cutting up the floor...oh and when it creaked as I removed the temp braces not gonna lie with two stories above me I about had an accident LOLLove it! I have a support pole right in my to be theater area as well and don't even want to know the cost and labor to have it moved/removed.
3 M2's for LCR? Impressive!