2-Unit Whole System Upgrade ROI

[Stuart Gardner]

Greetings BP Community,

We are currently closing on our first 2-unit property in MA, with the intention of house hacking the one and renting out the other. After the home inspection, we found out that the current systems in the property are really old and new ones are needed almost immediately. This includes both the forced air furnaces and one of the water boilers. 

Thus my question is, where do you draw the line in how far you upgrade? 

Do we simply just replace the systems with mid-range products, or do we install high-efficiency systems that will cost more upfront, but lower utility consumption and last longer.

Also, is the ROI on AC worth it for a rental unit?

Any insight will be greatly appreciated.

Thank you,

Stuart