at the very least, I would recommend you have the carpenters frame the basement as you would want it, run all your MEPs, drywall and float/tape the space. You can save $ by doing the flooring/painting and other finish work yourself, even if they just rough-in the bathroom you can add toilet, shower fixtures etc, this will also help keep u motivated to finish the basement sooner than later as the rough-in and drywall will be done, you're just left to make it pretty
