Consider installing Quickset locks that can be reprogrammed instantly. 

Then there are lots that you can change the operating keys without even removing the cylinders.Then there are combination door knobs where you can re-program a new combination.And then there are the magnetic strips like in hotels and office buildings.

I never got push back on doing things like changing locks, reprogramming garage door openers, or the other typical stuff - it's just now with the tenant damages the property management company is having issues. 

If you want to do that I would make sure you go to a university that has a good RE program or people you can network with.

FYI, I use smartkey locks...we just "reprogram" the key with a new key. 

Even if you haven't, as seasoned investors, what are your thoughts on Graduate school RE programs.

Reprogram television remotes. 

Hello,
Are they any known reputable RE Coaches or programs in the D.C., Maryland area? I would like to join a company or group that can guide me through some deals.

Try "What Every Real Estate Investor Needs to Know About Cash Flow" by Frank Galinelli who teaches at Columbia in its graduate RE program.  

@Will Andersen no doubt there are plenty of scammers out there trying to sell RE programs.