From a lender's perspective, separating personal and business credit is critical for scaling operations while mitigating personal financial risks.

@Guillaume Vidallet I'll chime in here since it seems like everyone answered your question and gave some great advice.I'll suggest that whether you have one LLC or multiple LLCs you have separate bank accounts for each and make sure not to commingle any money.

How you finance the buy is a separate thing.

Fortunately for the Gurus there is always a new crop of wannabe investors who can easily be separated from their money by selling hope. 

Where as the SFRs are emotional roof over their head purchases they are NOT being bought for cash flow or strictly for investment  although many know that appreciation has been very good to many of us native CA myself included.

I have one personally and I have found its better to rent the whole property vs. splitting it off and having a separate tenant with a separate lease.

Their previous lease includes a portion of storage in the basement with laundry access(also in basement).Current set up: tenant occupies floor #2 with separate access to the basement for their laundry and storage.Future plan: reno basement and remove storage/laundry access for tenant.

It has the appearance of 3 separate buildings from Germantown Avenue but from the interior the buildings flows as one.

Not as good as a separate metering, but its less cost and seems fair to me with little added effort for billing.

Is there one furnace for both units or separate ones?