Should I open a separate HYSA or similar vehicle to park additional cash reserves and or taxes set aside from prior projects?

I have the 2 units already done with separate entrance (utilities are not separate). 

@Ryan Rabbitt If you don’t get a match then I’d be sure to try to diligently set aside some set amount each paycheck in a separate account specifically for future investments.

I'm actually going to make a separate post right now. 

Currently, my setup is a separate bank account with it's own debit card to hold deposits, track expenses, and track income.

The work performed at the rent due would be 2 entirely separate things but I would not rent a place that needed work in the first place.

Along with the entity formation expenses if you create the separate management LLC, you will want to have general liability and perhaps even E&O or professional liability coverage.  

You do not need a separate LLC for each property or a series LLC!

After about 8 months, I wanted some extra income so I rented out half of my room to my 68 year-old co worker, and separated the room with a curtain....Here is a photo: If I were to go back, I would NOT have done this, but it was a good learning experience.

My question is, whats the HVAC system to use that provides separate utilities, and separate control per unit.