Prior owner has been evicted and unit has been re-keyed. 2.

If you deny access, they might have the authority to access using a locksmith at your expense.

Some of the measures we take are constantly checking on our vacancies and each unit is re-keyed once we have a signed lease.

Unfortunately gang ,there are "cocky and arrogant" individuals in any ,practice,trade,endeavor or profession.Plumbers with a disagreeble arrogant and surly nature do not last long where I come from.It is highly competitive here in So Cal.You gotta be a "Superstar".Having said that,,,there is also a Code of Honor amongst tradesmen in any town or city.We all know who the good guys and the bad guys are.The bad guys are "disowned" and get put on the blacklist,,,they do not get referals or reccomdations from reputable contractors.We also watch them very carefully and inform our friends at the supply house,,,,do not give these guys credit,do not recomend them,,,they are trouble.We know "The Good,The Bad and the Ugly".But get this,,,good guys tend to hang together and refer each other.They also tend to join credible contractors associations like the PHCC Plumbing Heating and Cooling Contractors Association.Heres a tip ;if you are fortunate enough to identify and hire a good licensed plumber,he will usually know and be able to recommend a good electrician,HVAC man,carpenter,tile setter,painter,concrete and masonry contractor,locksmith,roofer,landscaper,,,you get the picture,,,,Oh Yeah about that business of "plumbers savings lives".Well,,,That is a true statement,,,,that fact is,,,"Plumbers have saved more lives than Doctors,,,,"An old American Standard slogan was "Plumbers Protect the Health of the Nation",,Well,,,Its kinda corny guys but it's TRUE,,,,Why ?

If they don't follow through with that meeting I'd give whatever is proper notice in your state that I'll be changing the lock (hoping that they'll follow up and save me the expense/time -- I doubt you'll need to actually give notice for this).The next step would be to drill the lock, get the cylinder re-keyed, get the spares, put them in a lockbox at the unit and text/email the tenant the lockbox code.

Landlord set up and control of the property Wi-Fi can provide many advantages, from becoming a small but steady source of extra revenue, to enhancing security (remote control and recording of gates, entries, exterior building & common area cameras); to saving time (remote entry control & rekeying of door codes); to saving money on maintenance (through instant water leak notification & advance indications of appliance malfunction); to saving both tenant and Landlord money on energy usage through remote timing and/or turn on/off all or some lights, appliances and devices;  to ensuring compliance with lease agreements (real time notice of smoking on property, excess people on property), and so much more.Did you know that for $300 (plus installation), a landlord can install a device that will record and report in real time the energy consumption of pretty much any electrical device on the property (https://sense.com/ ) ( https://www.schneider-electric.us/en/home/smart-home/wiser/wiser-app/ ).

He refused to hire a locksmith to have keys made. 

(A few months ago similar thing happened to other door within the unit at that time, it wasn't really urgent so he contacted him so I called locksmith and paid around $150 to open the door.

However I got a text from Wife yesterday requesting that the locks be changed/re-keyed.

You can charge them for the bedbugs, getting the unit re-keyed since they took those and any other damage.