Converting apartment building to No Smoking

[Todd M.]

I'm considering converting my 17 unit apartment building to no smoking and looking for opinions and suggestions.

Minnesota, Class C building in decent neighborhood.

I purchased about 3 months ago.

If I did it, I'm considering rolling out gradually as lease addendums for renewed or new tenants.  Before I do this, I am considering communicating with the entire building about the plan to convert to no smoking, so they have time to plan to find a new place or start quitting.  

It's understood that it will help with turns (painting, cleaning, carpet, etc), so I don't need convincing there.

Smoking outside in Minnesota.  It's fine for half the year.

I don't know what's holding me back other than concern about loosing existing tenants and possibly lowering the new tenant pool in the future.  

Sound familiar to anyone?

Any words of advice or lessons learned? 

Thanks in advance

Todd