I understand minimizing costs ... but 300 euros for 3 months of work ? not even in Eastern Ukraine they accept that ... not even the lowest skilled worker in that country will accept this ...
Not even in a developing country would accept that. Even beggars would earn more than that in just a month.
Anyway, I think the client just want the best of you in the most minimal price. He is just trying the what ifs of negotiation. Just dump that client, he does not deserve professionals.