renting an apartment without a "real" job

[Fingerswinger]

i guess i am not the first one to face this problem:
i am not a student anymore and play poker for a living. i'm about to rent an apartment and have to tell the landlord (is this the word?) what i do for a living and how much i earn per month.

anybody had the same problem before? did you lie about your "profession"? should i just guess an average income?

would really like to hear your experiences.

btw: i live in europe if it matters, i guess formalities when renting an apartment might be different in other parts of the world.