Problem one escaping: She's going to need to be outside with him, and I'd never leave him alone on the tie out for more then a couple minutes tops. I'd also invest in a martinsgale collar aka anti slip collar, for walking him.
Problem two door dashing: She needs to work on having him settle on his mat or in his crate while she answers the door. Fist teach a mat or kennel cue, then work on having him stay on it till she gives a release word, finally work on having him obey that cue while she opens the door.
Until he's trained there's a couple things to do to keep him from door dashing. One is telling the visitor to wait a minute while she puts the dog in a room and shutting the door. Two is using a baby gate to close him away from the door while it's answered, again she'll have to request the visitor to wait. Three is getting an exercise pen (they come in a variety of heights) and fixing the ends to the door frame to block off the door so he can't dash out. You can make the partitioned off area as big as you like it just depends on how many panels you have unfolded.
Problem three destruction of the house: That one is a bit harder. Y'all need to figure out why he's doing what he's doing. Is he thinking, "Mom's away! Time to party!"? Is he thinking, "I'm bored and have more energy then I know what to do with, my job for the day is eating the couch."? Is he panicking because he's alone? Ask her to set up a camera to record what he's doing while she's gone, she needs to see if it's a dog that's having fun, releasing energy, or one who's in full blown panic mode. Each one requires a different course of action.
Problem four pottying in the house: First get him cleared medically, you don't want to treat a problem as behavioral if it's medical, you just waste time and never get anywhere. When is he pottying in the house? Is it when he's alone and your daughter has left for the day, or is it all the time? Some dogs will potty in the house from anxiety, if that's the case lessening anxiety will help. If you know it's behavioral then y'all need to go back to housetraining 101. No freedom in the house until he potties outside. Figure out a schedule for him. Take him out at the set time, give him 5 to 10 min to potty and as soon as he lifts his butt from pooing give him a very high value treat and let him know what a great boy he is. If he doesn't go then bring him back inside, either tether him to you, or crate him, wait 10 minutes then take him back out and try again. Do that over and over until he poos outside. When he does poo outside he can have freedom in the house until the next scheduled potty break.
Not knowing his history you might try clicker training him so that you can use a long line to let him potty, when he does click as soon as he is done pottying then give him his treat when you get over to him. The reason being someone might have punished him for pottying in the house and he's now afraid to potty while a human watches. Try taking him for a walk and see if he'll potty on it, some dogs do not like to soil their yard.