This can be a more cost-effective solution than having separate water heaters for each apartment.

Yes, there is a solution, but it isn't a quick post.

This might be a little weird but I came across the post because I'm looking for information about REIReply.REIReply is a real estate marketing system built on Go High Level's white-label plan.And I use and love GHL because it's more than just a CRM BUT it's not specifically built for real estate investors.That's where a company like REIReply might come in.You see, several digital marketing companies use GHL to run their businesses and many of them, my company included, have developed powerful follow-up systems.However, the problem is that GHL is only as good as the templates, campaigns, etc that are built within the system.While I have almost 20 years of digital marketing experience and can build effective and powerful campaigns for me and my clients, I don't have nearly as much experience in real estate.Ergo, I'm considering REIReply.If they are as good with real estate marketing as I am with my company's marketing, they have a killer deal.

Try to find a solution any future issues like this.. 

It is not a solution for long term.

Thanks I would look to AirDNA for this - they have long had pretty good (guidance, not perfect) rentalizer solutions for projecting revenue, but have recently added good info on expected expenses and the property managers in the area (for at the very least coming up with expected operating / management costs) etc

However, if you labeled it as an addition (not a separate dwelling unit), code only requires 30 minute fire assembly (1/2 gyp) between sleeping units (bedrooms).

I immediately looked at the portfolio and raised some rents I had been putting off doing which was a start in a better direction but not an actual solution.

We have had zero interest so far.Yes - I've engaged with the team on solutions for your property. 

You could also get a wire mesh of some sort (this Hog-wire looks good) and have an easy solution to your problems.https://www.homedepot.com/p/36-in-x-96-in-Wild-Hog-Black-Met...