I have been through the process here and I imagine the procedures will be similar there, as they are all motivated by the need to protect public health. Eggs and chickens are notorious causes of e.g. salmonella, e coli and campylobacter infections, which can be very serious for some consumers. So the rules are put in place to ensure that people selling eggs to strangers (i.e. on a larger than backyard scale) or to restaurants who will be serving their eggs to yet other random people, know what good hygiene practices are and implement them consistently.
The requirements often seem, at first sight, a lot more complicated than they actually are when you get down to reading carefully what you need to do to meet them and pass the inspections. Here I had to get to grips with the concept of Hazard Analysis Critical Control Points and show I had performed the analysis and had a plan for failure at any of the identified critical control points. In the case of selling eggs, they are just very fancy words for working out where and how exactly an egg could be infected with any of the bugs of concern, and what I do about any egg I think might be so infected (the answer to most such questions is, if in doubt, remove it from the human food chain).
It's only the first time the paperwork is burdensome, when it's all new to you and you have little idea what you're doing; thereafter it's simple, like riding a bike. However, it may not be economic to do what's required there to sell to strangers and restaurants, and it may be easier to scale down your production again to below the threshold. Alternatively you may need to factor in a price rise for your eggs to cover outlay on facilities improvements (aiming to get it back over a few years) for example, but then you risk losing the customers you're aiming for. Hope this helps.