I have implemented Podio to handle my complete operation from lead intake to management to conversion.

How do I implement the system to tenants that are already there and did not have this parking fee when they started renting?

Having a verbal price for a free short walkthrough will definitely be implemented into my business practices!

While some condo associations have implemented mandatory annual checks on these systems to try and help prevent fires and leaks, that doesn't mean things can't happen at any time, and it doesn't mean they're negligent if they don't. 

What ideas did you guys use and implement?

@Dick Rosen both of your suggestions are great, and sound like easy implementations, not to mention fair.

I would look at some case studies of what happened in areas where rental ceilings were implemented.

These are some great ideas and definitely some things I'll be implementing!

My quarterly water/sewer bill is just south of $1200 on the 5 family, heat this month $250.It was built into the rent when I took over and after I implemented conservation/ regulated thermostats and insulation my profit jumped (one heat bill was almost $800, prior to sale).You are set up with separate meters- If you chose to split the bill I would consider whether you can institute cost saving measures first that may give you a profit.

I personally think you should live in something like this before trying to do it non owner occupied as you'll learn SO MUCH on what to look for in new tenants, what rules to implement, how you will implement the rules, what boundaries you will set, and how you will proceed with problem tenants.Furnish the rooms.