I don't think your receiving the best info here. If you do a search on this forum for seahorses you will find a few more informative posts. Sorry kinda short on time for the moment. Try this
link
The cost does not have to be so high. Do they sell Eclispe systems in your neck of the woods. A 29g tall Eclipse system would house two pairs of horses just fine IME, with no additional equipement (filters, powerheads, protein skimmer, refugium, lighting, UV, etc, etc). You will need to get about 14kg of LR.
Seahorse tanks do not need skimmers. Infact they are not desirable unless housed in a sump. I have kept seahorses for years withot a skimmer. It is a waste of money IME.
Require a lot of care...specialized tank setup.....seagrasses.....no stinging corals.
I have not noticed the need for any specialized care in regard to seahorses. The setup is just different from a typical reef. Refer to the link above for more details.
Seahorses do not need seagrases. Many keepers infact most that I know do not use seagrasses in there tanks because seagrasses require a DSB for roots and also more intense lighting that will elevate the tank temp.
Non stinging corals is accurate. This limits you to softies. The only exception being the large hairy mushrooms that are capable of swallowing an entire fish.
Not to mention the extreme feeding difficulties..........
I have only been keeping seahorses for 5 years, but I have never experienced this either. is this based on your personal experience. BTW I have had the same horse for all 5 years.
Never a problem feeding, the guy is a pig.
Generally speaking, seahorses are prone to different diseases than other fish (Vibro being the main one)
The most common outbreaks of vibrio occur when mixing different syngnathids from different sources, or when a seahorse becomes overly stressed and is in a weakend state. I have no personal experience with vibrio, again my experience is limited. I have researched the bacterial disease extensively, can go into great detail if you wish. Just saying that more often then not it is a care issue.
On the plus side seahorses are very resistant to many of the major fish diseases out there.
Buying Cb will cost a little more upfront, but is well worth it in the long run. Many of the misconceptions about seahorses stem from a time when CB where not widely available and acclimation proceedures for WC's were not understood. I will go into more detail here to if you wish, but the short anwser is CB is a much better choice for a new seahorse keeper.
Don't be discouraged. My seahorse was the first fish I did not win at a carnival with a ping pong ball. I have had him for 5 years and he is WC. They are not harder than any other fish IME.
If you don't fins what you are looking for here there are several sites dedicated specifically to seahorses.
Good Luck.