Custom Polycarbonate TV Enclosure

I need a custom polycarbonate enclosure to securely house a 75" TV underground. The enclosure must be waterproof to protect the TV.

Requirements:
- Made of durable polycarbonate
- Sized to fit a 75" TV
- Completely waterproof - the three sides and the bottom will need to be waterproof, the top will be open for the TV to lift out of the enclosure.

Ideal Skills and Experience:
- Experience with custom enclosure design and fabrication
- Proficiency in working with polycarbonate materials
- Knowledge of waterproofing techniques and materials

Please provide samples of similar work and an estimated timeline.