1998 Chrysler Town and Country HELP! Single mom with 98 ch

I HAVE A 1998 CHRYSLER TOWN & COUNTRY LXI. IT HAS A BATTERY DRAIN WHICH CAUSES THE BATTERY TO DIE OVERNIGHT. SEEING HOW I DONT HAVE THE MONEY TO TAKE IT TO A SHOP FOR THEM TO LOCATE THIS PROBLEM I DISCONNECT THE BATTERY OVERNIGHT AND RECONNECT IT WHEN I LEAVE. I DID THIS THIS MORNING AND A LOUD SOUND AS IF ITS TRYING TO TURN OVER BUT CAN'T THE VAN STARTED WITH THE NOISE REMAINING, IT ALSO HAD A STRONG BURNING SMELL, SO I TURNED THE KEY TO THE OFF POSITION AND THE SOUND AND SMELL REMAINED, AS IF IT WAS THE STARTER BEING STUCK STILL TRYING TO TURN OVER. I COULDNT GET THE CAR TO STOP SO I DISCONNECTED THE BATTERY. OF COURSE THAT STOPPED IT. I CHECKED THE FUSE FOR THE STARTER AND IT WAS OK. I RECONNECTED THE BATTERY, IT WAS SPARKING AND AS SOON AS IT MADE THE CONNECTION THE SOUND WAS STILL THERE. I LEFT IT SIT FOR ABOUT 3 HOURS. I THEN PULLED THE RELAY TO THE STARTER AND RECONNECTED THE BATTERY. NO SOUND. I PUT THE RELAY BACK IN AND TURNED THE KEY TO START IT. THAT SOUND CAME BACK. TRIED TO TURN KEY OFF AGAIN AND SAME THING, HAD TO DISCONNECT THE BATTERY. COULD THIS BE AN IGNITION SWITCH PROBLEM. THE KEY WILL COME OUT WHILE THE VAN IS RUNNING, I ALSO HAD AN ISSUE WITH THE STEERING WHEEL LOCK A FEW DAYS AGO. IT TOOK ME 45 MIN TO UNLOCK THE STEERING WHEEL. PLEASE HELP!