It depends on how much efforts you want to put onto it, it is a hard task, at least for me. Cost wise, it may not be worth it.
I recently started a trial and failed at day 16, due to insufficient cycling/filtration in a 1 gallon jar. Ideally, I should have done it in a 5 gallon bucket or equivalent aquarium, but I think most people cannot afford this expense for a near impossible mission.
Once you have decided to do it, you have to make/buy salt water and calibrate the
salinity to be 30-34 ppt (some says it could be 18-25 ppt, I guess Amano has different species). Then dedicate a light,
air pump and a tank for larvae, at least 2 weeks before hatching (hatching could happen in 10 days when you first spot berried mother, so plan way ahead) , because you need turn light on 24/7 to cultivate unseen algae as food. In my opinion, cycling is good, but it is kind of hard for a mini-tank, especially when filtration is absent. You may get some seawater from LFS’s reef tank to seed the algae, but don’t add concentrated phytoplankton, because it is hard to control the phyto population and it could over grow to kill the eco-system.
As I said, I failed at day 16, so I don’t have more information to share.The more I explore the saltwater environment, the more money I spend... Now I have set up a 3 gallon reef/dwarf seahorse tank and leave the 1 gallon jar running with same water/cycling/substrate condition, but without anything that could eat Amano larvae. In this case, whenever the next batch comes, the saltwater eco-jar is ready for 2nd breeding project, because I can get anything essential from my saltwater tank.
This is a long way to go and it is fun and it is costly.