They came and replaces the meter on my personal residence one day when I was at work.

Our next purchase, a SFH, we purchased in our LLC’s name and paid $10k cash for it at a county tax auction.We also each had former primary residences that we’d turned into rental properties.

@Lyle Cooper To be honest, if you don't feel like doing any leg work, you can always hire a broker.

Most of the credit unions I spoke with lend at prime rate or even below prime rate if you go with a lower LTV, however to get the amount of credit I wanted I decided to borrow up to 95% LTV of my primary residence 

We're in the Brewerytown section of Philadelphia and to be honest, we know our market better than most brokers.

When buying a primary residence, there is no limit of financed properties with many lenders, although some are still going to have overlays and limitations.On your second question yes, you can always pay your loan off with cash, or pay down your balance, and later refinance. 

We're currently working on some minor TLC on our personal residence and are going to look into using a HELOC to fund our first flip.

FHA loans for mixed use properties are absolutely available for primary residences.

Having said that, if you don't have a primary residence yet, you could look at a multi unit and get started with that.  

., I'm not so sure what the advantage is, honestly.