For those who have played the game longer and know the market, are there any breeds that are more ´´worth´´ getting into/breeding/showing then others economically speaking (easier to sell, buy for reasonable prices, good stud and mare avaliability for good prices) or would you say they are pretty even and it just comes down to personal taste

So showing wise all breeds are on a level playing field. Breeding wise PON (height restrictions) and TB, RID, and KNN (can't crossbreed + KNN have gene restrictions) are the breeds that there's less supply and more demand for because of said restrictions. So they can be harder to get into, but once you do, they're generally more profitable than the other breeds. For instance I as a KNN breeder still can get several thousand for a PPP-PEE mare, while say a SH breeder has a hard time even getting 1k. And my EEE girls are still worth 75-100k while SH EEEs might not even go for a quarter of that.