I have researched potential investment areas and found a market in North Carolina that meets my criteria.

Happy to go through your specifics with you if you’d like

Ask specific questions, this is your property and you have a right to know what is going on.If he still does not respond, then I think you have to at least call an attorney and make sure that you are proceeding legally (for your state).I would bet @Nathan Gesner would have some ideas on this.....Good luck!

Just on the business level for landlords to be as specific as possible with their requirements and give detailed line item dispositions. 

I also ask for referrals, I do not just choose the first one I see that has a handful of five star reviews.Tenants: As long as your screening criteria is where you want it to be (my preference is rather high), your lease agreements are rather air tight, and you keep an open line of straight forward and honest communication you should not have too many issues with your tenants.

Advertise that you are holding an open house on a specific date and time.

Quote from @Ivan Terrero: It really depends on the country of origen Can you be more specific? 

A question for you:  on what criteria did you select your realtor? 

.- Only doing showings at specific days & times, leading to longer vacancies- Requiring prospects to fill out applications first, before scheduling a showing to protect their time invested/wasted (which turns off some prospects, leading to longer vacancies).- Charging owners for pics- Charing inflated application fees to make, you know, some money for their time spent- Some even charge tenants MoveIn Fees and other charges to make money.So, don't be short-sighted and expect PMCs to work for free!

Are there specific questions or criteria I should use when interviewing potential law firms to ensure they won't be as detached and unreliable as my current firm?