Our property manager wants to install a Kaba automated lock, but the locksmith says the only way to do this is to drill a large hole through the door which will destroy the multi-point locking system.

This was verified by the locksmith when he tried to open the lock. 

We hadn't opened it for years because I lost the key, but I finally decided to hire a locksmith and open it.  

No more paying locksmiths (for the most part), though I generally would replace them myself.  

I since contacted a real estate attorney and has been advised that I can assert myself and enter the property if I have keys or get a locksmith. 

Anyone have a referral for a reasonable but dependable locksmith in the Houston TX area?

No one wants to be greeted by an angry tenant waiting with firearms.At the appointed time, we come with a locksmith, two moving men and their moving van and us in our protective gear (work clothes, gloves, N95 face mask, and eye protection) and boxes and bring construction quality plastic bags.

Save extra funds, find a good, quick locksmith to re-key locks asap, start a relationship with a real estate, owner-tenant lawyer who can manage the legal situations, understand local laws and what would and would not apply in varied cases, have a stable of vendors and contractors who can do any and all work needed to return the property to desired condition, start a folder with necessary paperwork for court filings, connect with property managers or other owners who can help with information, be prepared to document EVERYTHING, etc. 

Have your locksmith ready to re-key right away.

She was making repairs already when the lock smith showed up.