You need your drying to be somewhere between 60-70° f and 55%-65% humid. I’m sure a small fridge could be found used somewhere for cheap just gut it out, hang your plants in there maybe add a humidifier on the bottom if needed. I haven’t done a lot of research into this and never tried fridge drying but they do make cooled humidors for cigars… some allow you to choose your humidity and temp. Might be worth looking into.
However your plants are still gonna smell during flower I don’t know if they smell much stronger during drying. How are you preventing smell now? If using a grow tent w a filter you can dry within ur grow tso do I lower temp in