Afro hairs are tricky due to difficult extraction from what I read. So you need a doctor that is good with extractions.
The only budget options I know are in Turkey, Dr Turan, Dr Bicer have good technique, other docs that have good ratings are dr gur, hlc, Demirsoy, Pekiner, keser
I don’t know how they are with Afro hair though, all the European ones are so expensive. Dr Bisinga is exceptional and dr mwamba is also known for Afro hair (had a really bad growth with one Afro patient here though) but they’re the most expensive docs
There are other good doctors but they will break your bank and you only have 6k budget so Turkey seems your only option where you will have a decent result and not get butchered