Design MySQL Transactional Database

I’m building an application that will rely on a fully-ACID, relational back-end and I need a MySQL database planned and scripted from the ground up. The core purpose is high-volume transactional work—think frequent inserts, updates and deletes where consistency and speed both matter... (Budget: $10 - $30 USD, Jobs: Data Modeling, Database Administration, Database Design, Database Development, Database Management, MySQL, PHP, SQL)