The thing about koi Zman is the longer you keep them and the more you lern about them , then the better and more expensive they get, use your noddle ,my young friend you have Birthdays and Christmas's dont you ?.....so whats wrong with asking your family and relatives to get them for you
Part of our extensive koi health and fish disease library comes from Birthday and Christmas pressy's some comes from the selling on of koi when they have grown on , some books come from fish Auctions the rest are gifted to us or are from Amazon thats how we built it up .
So between Birthdays Christmas's and selling on of your koi when they get too large you sould be able to aford them .
Want me to let you into a little secret ???... you really like my koi dont you ???......well our most expensive koi ever was £125.00 oour latest £75.00 but the ones you saw the Photo's of ?..well thy cost as little as £45.00 as you progress and if you get to know what it is your looking for "Val has a perfect eye for koi" , I'm just he wallet
Buy some of the books weve bought they will teach you all you need to know and Amazon is the cheapest place to buy them especially if you look for good conditioned second hand ones :-
https://www.gardenpondforum.com/threads/our-fish-koi-health-library-with-reviews-of-each-book.10498/
Hope this helps in a really big way for you mate
PS this is only part of all the books in our Library
Dave