To be honest if your cleaning lady is good with your other two dogs and looks after them whilst you are on holiday, (what a lovely lady) then why do you think she will be no good with a pup? She may very well enjoy it, or do you think the toilet training, playing and socialising will be too much for her? To be honest you need to be the trainer and you will be with the pup for 5 days of the week so your cleaning lady need not do anything but the very basics with your pup. :-)
Normally I would not recommend a pup going to someone elses house for a few days a week as I personally think it unsettles them, having two homes and two 'owners' far better for someone to be in your home and your cleaning lady is obviously a regular so for me she is ideal,

but not knowing her or yourself perhaps she may not wish to look after a pup? Or she may have other commitments, in this case going to her home would not be so bad as it would be someone your pup has grown accustomed to in your own home.
I don't believe in leaving a very young pup crated in the day time for longer than a couple of hours so if your cleaning lady can not be there to help toilet train, play and socialise your pup, then you will have to find someone who can recommend a pet sitter, dog walker, (sometimes they will take on a dog/pup for the day.)
I've never had this problem as I've always had friends and family if need be, but as already said be very careful if you end up hireing someone, try to get them recommended through, friends, other dog walkers, (whom are usually invaluable, so stop and chat to people whilst out walking your other 2 dogs it's amazing what you can pick up that way) vets, or the breeder.
You never know perhaps someone on the board could also recommend a person close to your area. ;-)
Otherwise it sounds as though you are all set and ready, I wish you luck in any future showing, and hope that you can sort out your two days. :-)