Interesting comments above - have any of you used residential training or are your comments opinion?
I come from a working dog background and residential training is very common.
Think of assistance dogs they have loads of residential training, police dogs, scent dogs, security dogs, working sheep dogs, all have residential training and then are passed onto owners. (many with very little dog experience).
Residential training abroad is very popular. I spent a very happy year in Spain doing board and train with puppies so that they were house trained ready to live in apartments with their owners (and I got paid a dream job!)
Residential training for dogs with issues is really effective, it gets them out of the environement lets them decompress and then in a state ready to learn.
OP if you feel out of your depth (which tbh in this present climate is not surprising as life is not normal) then good residential training may help and take the pressure of you.
Do grill the trainer, look at their training methods with a toothcomb, speak to other owners who have done this method of training. Really important to ask how much advice and how much hand over there will be to you. I would expect more than one sesssion on hand over split over a period of week.