I have alot of experience breeding (although not Greys/yet), I also deal with hundreds of breeders (breeders of all sorts of birds).
I found it to be a incredible experience. I miss my breeding days I get my bird fix through my clients and all their birds.
I have a nest box on my cage (I put up two weeks ago/early),
I would love to have my own baby Grey (only my very own/not buy from someone) so I will hope that one day the two go for it I am set up for pets in a higher traffic area (not crazy busy, but by my entrance and I am a home buisiness, however my hen has laid in the past (with a different male in a similair set up) she is a relaxed hen however she would not let the male near her ever. This male she likes (alot) but he is young 5.5-6 years, so I believe I will wait for a couple seasons, I am a very patient person so this is ok by me.
Breeding is a great hobby it takes lots of work but the rewards are undescribeable.
If you deside to go that route I must warn you it can be very addictive
I was so involved I was showing birds, A bird judge, had a flock at one point of 280 (a bird freak/I am under control now) ha ha
currently only have my two greys but still have 8 others currently here for boarding (definatly under control)
Sandi