Make sure the washer is on the highest spin speed setting to remove as much water as possible from the clothes as possible before drying.
Spread the clothes out well rather than bunching them up. The greater surface area exposed to air movement the quicker the drying.
If possible hang the clothes above the stove where there is more heat and convection currents to help evaporation of the moisture in the clothes.
Use a dehumidifier whilst the clothes are drying. I suspect this will be cheaper than using a tumble dryer and the water produced can be used as distilled water for steam irons etc.