support post for outer shell

the home stretch is in view for the outer shell of my studio. one of the last things is adding mass to the ceiling. about 1000lbs of sistered framing and 5/8" drywall. as you can see in attached there is a large glue-lam spaning about 23'. a structural engineer is doing the math and will get back to me on the new beam load. if the beam can't safely take the load i will be faced with a few choices. 1) install a post mid glu-lam and cut a footing in the floor. 2) remove the glu-lam and sister the existing 4x4 with a type of laminant beam (about 18' span) frankly i think option 2 will be soo much more expensive i can't do it now. so if i run a post down...does anyone know what i can expect to sacrifice? it will run from about center ceiling down to a large concrete slab. wood post? steel post? when the inner shell comes along (before my death in theory) i will have to deal with decoupling it from the inner ceiling. thanks