Currently similar issue for you. Issues are: 1- mounting tires, 2- time. Involved in remodeling and needing to select parts and install some of them. Unfortunately it's been months. With so many contractors in and out, it's almost better to not have the bike assembled. Hopefully I can assemble it this weekend, after I install some bathroom faucets as we are down to one working bath in the basement and remove the front door for repainting on this last warm day for a long time.
Reviewing my post, basically just get tired at end of day and spend a hour or two watching TV instead of working on assembling bike and then getting out riding. For my "exercise", I've just done a little walking