Just asking coz there is less to advise.
Guessing they have recommended the Dog as suitable for your circumstances. In that case, I would just ask about any back up from the kennels if you have any behaviour problems. Is anyone there to advise or pop round to help.
Find out as much as possible about the dogs background as they can behave different in kennels.
Have any of your kids, if applicable, been to meet the Dog already ?
Find out also, worst case scenario, what happens if the Dog has to be returned.
Any rules on informing them if you move ?
Is it neutered / chipped etc ( assuming it will be )
What it’s been eating ?
Mum does home checks for a animal charity, and these things will have already been put across to the potential owners by her charity so she just suggested running through that list just to make sure.
Most should have been covered already.