Please read about the possibilities below. If you are very determined that you would like to come to Hungary and work with our group send an email to email@example.com.
Being a postdoctoral fellow in Budapest is not a financial investment. But it can be a scientific investment. The salary of a postdoctor (tudományos munkatárs) in the Hungarian wage system is 277.200 Ft (~ 850EUR) before TAX.
The postdoctoral fellowship of the Hungarian National Research, Developments and Innovation Office offers more 380.000 Ft (~ 1200 EUR): Postdoctoral Fellowship 2020 (The deadline is 24th of Febrary 2020).
There are international postdoctoral fellowships which pay much more, but they are quite competitive. You can check the Marie-Curie Fellowships, or some outgoing fellowships of your own country. Such examples are the Feodor-Lynen program of the Humbold Fundation if you are German, or the fellowship of the Japan Physical Society if you are Japanese.