Run 4 new circuits into mechanical room in basement. 2-20d 2-15s isolate furnace circuit as it should be. use one new 20amp circuit for bath the bath plug. use the other 20amp circuit for 2 quads below furnace switch for desk in other room use one 15amp circuit to tie in rest of basement. last 15amp circuit will be a spare in j box in ceiling. remove j box for hot tub wire. install 8 space mini 3r panel. put shop circuit wire on its own breaker in that panel. install 2gang bell box to left with 2 20amp circuits on 2 gfis and a bubble cover.