Please also have a plan on what to do with any chicks. I had a lot of fun last summer allowing two of my budgies to mate and lay eggs. I bought a nest box and they did the rest. However, they had way more than expected. Before the first clutch was completely out, she had started laying a second clutch. They had 14 chicks in all! I had to hand-feed some of them for the first few days because mom had so many to care for (meant getting up at night when I heard them chirp, keeping them in our bedroom so I could hear them, not being able to leave the house for very long, etc). I had to provide special vitamins and food for mom and dad. Mom started to get really tired-looking at the end of it and I felt horrible about the whole thing. Also, two babies died. They were the last two of each clutch, and I think they were smothered by their siblings. It was a sad thing.
But as far as the babies went, I thought, no problem, they are so cute, I can advertise them and easily place them with good homes. What I found out is that there are a *few* good people and a lot of people who are not so great, who I would not trust with a houseplant. Some explained their family situation (baby on the way, three very young kids, living with their mother), other I just got a bad vibe from. I was able to rehome 10 of them over a couple of months. It was time consuming, and things got ugly if I decided not let someone adopt one. I got hate mail!

The want ads are full of people trying to sell baby budgies-- and older budgies they no longer want. I didn't want my babies become statistics like that.
I ended up keeping 4 of them because we could not rehome them all. The end results was more birds than I had planned on having. They are a lot of work-- messy, loud, etc. Loved, but a lot of work.
Anyway, although it was a neat experience I would have never done it if I had known all that was involved. I have now chosen to only get birds as rescue cases. I feel that by breeding these budgies I contributed to the problem of unwanted birds.
Not to give you a lecture. I just wanted to share my experience and feelings.
__________________
I'm a full time nursing student, wife of
a very kind, patient husband of 13 years, 2 great kids
A Dozen Peeps Filling My Heart and Home
9 budgies, Moki the Jenday conure and Daisy the Sun conure,and new arrival Nibbles the Cockatiel
The End!!

RIP Sunny
Those who realize that all life is one
are at home everywhere and see themselves
in all beings.
--Taittiriya Upanishad