I do have a tumble dryer but use it sparingly.
Whenever I can, I put stuff on the washing line outside. Unless the temp is almost freezing, or it is actually raining, then in the UK I think this makes a difference to drying times. If I hang sheets out on a cold windy day, it starts off the drying process. Then rather than putting them in the dryer for an hour (if I hadn't hung them out first) I only need them in for half an hour.
Towels I do a big load at 60, fastest spin possible. I try not to let these dry indoors, but use the dryer for these. Jeans and towels will take ages to dry on an airer ime.
If our bedding needs washing, and it is raining, I check the weather forecast. If it looks better a day or two later, I will delay the wash by a day or two.
Agree what others have said about hanging the stuff with room for air to circulate. With shirts etc I use a slower spin, and then put them in the dryer for say 20-30 minutes. I then shake them out, hang on hangers and no need to iron.
I have 2 airers in the spare room, with the window permanently open a tiny bit (we can lock it open in that position).
OP I think 3 airers in one small room is too much. I hate laundry downstairs, but our living room is warmer so if we haven't got visitors I sometimes move an airer down here and that helps.