Dragon fruit plants for my collection

Since 4 years i'm triyng to grow alternative fruits. I live in a region where agricolture is a bit obsolete,mainlu based on citruses paid about 0.05 €cent/kilo (like oranges) and kiwi (0.50 €cent/kilo) to us and I want to do something different.

I'm testing exotic and tropical fruits,and pitaya seems to be the best choice among the +60 species of fruit plants I have in about 200 square meters greenhouses.

Each variety have different needs and i'm looking for the best compromise,unfortunately there are so many varieties and all the reliable sellers are base in Asia and America ,no one in Europe so shipping & handling costs are very high for me.

I need the help of all for a little sum ,my goal is to provide a new opportunity to my parents and improve my collection.

I will use funds for buying plants,pots and soil mix,

Everyone is invited to see this my little project and maybe tasting fresh fruits,of course i will be happy to share progresso with you.
Thanks in advance for your interest!