Otherwise, the renters could be bitcoin mining or driving 2-3 electric cars and you’re paying for everything. 

No personal experience here but here's a helpful reference from someone who wrote a blog about different aspects of a 2 flat remodel in Chicago Scroll to "Two-flat journal 6: How to make an all-electric house" - - speaks a little about heat pumps and cost In the HVAC section.  

Renting by the room can be a powerful strategy. 

House hacking is a powerful strategy that can put you far ahead financially compared to those buying a primary residence or continuing to rent.

Also UPDATES ARE MADE FREE OF CHARGE..We all know how important environment is to development, i love the fact that their business model is about creating investor communities built for locals by locals and powered by one education system, this way we the people can be on the same page to minimize bad deals.  

However, due to my college and career experience I can handle any of the electrical work while following the NEC.

Also, Rivian is a new electric car manufacturer that is setting up in the old Mitsubishi factory in Normal.

However, with the market being saturated, there might be opportunities to negotiate better deals on properties that could be suitable for long-term rentals, which typically offer more consistent cash flow throughout the year.As for seller financing, its a powerful tool, especially if you are looking to keep your personal finances separate.

In my specific case, the tenants pay electricity & gas, but the previous owners were paying for water.

The owner pays for all the bills currently 575 per unit, which include water, electricity, internet, and cable.