Some ideas for you, Horton. The peg board, baseball pull-up grips, plyo box and dumbbell rack were DIY.
The smart trainer automatically adjusts your resistance to follow a GPS route of your choosing. You can bike anywhere in the world without leaving home. Not as fun as getting outside, but I’m in the same boat as you with a few little ones in tow...
There is room in the middle for skipping rope, stretching, yoga, etc. The top TV swivels out so my wife can do her yoga/workout videos.