Most likely cheaper to convert office space rather than rebuilding .At the same time there is the trend of less people working in traditional offices .

In fact, the cheaper the better.

@Ryan Kelly There's no doubt that it would be easier and cheaper to leave the existing plaster and I would not remove it solely for the sake of making the electrical work easier.  

(I have done this and have had success)Bandit signs is cheaper and you can target neighborhoods.

Some are cheaper, but also are horrible when it comes time to pay out. 

Marketing doesnt get any cheaper than that.

They are not necessarily cheaper to maintain and repair, but you are more likely to replace them versus repair if there is a major component failure.  

That would be like going to a restaurant and asking the cook to make you a steak in the parking lot for cheaper than the restaurant is charging.If you are working with a property management company that handles repairs by outsourcing everything you could ask for a referral to other contractors and speak directly with some of those contractors.

They are cheaper and won't break down.

It may be harder to find the seller but in the end it will be cheaper and less risky for you (personally).