Is a site with 1,500 pages, (1000 of which are E-Commerce Pages) Too Big to Migrate to WordPress?

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  1. 1500 pages aren’t that much. Performance problems may appear if you choose a bad permalink setting.

  2. Do not trust the official requirements. I suggest PHP 5.3+, MySQL 5.1.51+, and at least 128 MB RAM.

  3. The main problem is usually the structure of the old database. If you are able to write a good importer, it shouldn’t be that hard.
    Make sure your old URLs are mapped to the new WordPress permalink settings. There are plugins , and WordPress has a field _wp_old_slug for some cases, but I’d recommend a a solution via .htaccess/httpd.conf and mod_rewrite.
    The price depends on your dead line, the complexity of the theme and much more. 🙂
    I wouldn’t take less than 2500 € (~3250 US$). Ask on jobs.wordpress.net

  4. WordPress isn’t made for stores. There are many plugins … but first make tests to see if they meet your needs. You may combine an online shop system like OsCommerce, Magento or Zen Cart with WordPress. In the long run, that could save you much work.