One already had electric heat in the upstairs unit and the other duplex needed a new boiler when we purchased it anyway, so we installed a new propane boiler for heat/hot water in the large unit and a couple Rinnais in the 1-bed unit.

If for some reason it were to happen, there's a couple workarounds that can be done.

Under $150, easy to install and use, tenant can set their own code but landlord can retain the master and always have access, tenant can't lock themselves out, standard key for emergency backup, batteries last a couple years, etc.

Quote from @Taylor Robertson: I've been working with an agent for a couple months now in hopes of finding my second deal.

.: I showed up to a couple of properties in the past where there were a lot of other potential buyers that showed up at the exact same time. 

I’m married, and my wife and I have a 5-year-old son who keeps us on our toes!

Check out your local Salvation Army, they always seem to have a couple in decent shape for $100 or so....

Do you need all this for a couple of rentals?

Any quack on the internet gives out ESA for a couple hundred bucks and landlords left and right are accepting animals they do not have to accept.As I said though, there are some ESA that are actually real, but still not protected and then it's a landlord decision.

As the saying goes "Date the rate, marry the home"