[Zope] database design question

[Arkaitz]

Hi all,

I am starting to design a web app, which will have a database consisting
of 5000 to 10000 restaurants, which could potentially grow, but not much
more. 
I'm a newbye to Zope,and initially my idea was to keep all the data in a
MySQL DB, and access it from Zope. I need to do some very flexible
queries and searches on the DB, and I've found that Z SQL Methods get
quite awkward easily.
I am thinking now about a pure-Zope (ZOBD) solution. I have thought
about using a ZClass for each restaurant and keeping them organized in
directories with the next hierarchy:
    County/City/Restaurant
Is this a reasonable idea at all to do? I can write Python, and would
like to avoid DTML for non-presentation tasks as much as possible.
Also, I would need to be able to do queries of the style 
"give me restaurants that sell chinese food anywhere in this
region/city".

I appreciate any recommendation or resource that can help me make a good
decision.

TIA,
Arkaitz.