The problem you probably have since your system still has freon is that the new hose will have moisture in it. Moisture in an AC system affects cooling performance and will possibly clog the dryer.

It might work just by replacing the hose quickly not allowing much addiional moisture to enter the open system and re-charge with freon. Worst case on that is the dryer would be ruined and you'd have to replace that and get a shop to vacuum it anyway + more freon.

It costs about $60 in Texas to get an AC system vacuumed. What that does is actually boils the moisture and is vacated via the vacuum pump. If you could find someont that has a do-it-yourself set up you'd be on your way. (=a refrigerator compressor modified to service AC systems)

Good news for you is winter is coming.