If you are considering hiring a home technology professional, consider first and foremost the references and who referred you to them. What kind of work have they done in the past? Will the work at your home be similar in scope to their experience and will the staff currently working with them have the knowledge to do what you want.
Don’t trust your project to anyone that can save you a bit of money on equipment. In the long run, you will be frustrated and it will cost you a lot more money to fix it after they leave you hanging.
CEDIA offers industry training and you should only hire a properly trained firm. CEDIA certifications don’t guarantee the work, but it is a great place to start.