What are the average ranges of down payment for house hacking a 2-4 unit property for Fairfield county?

Honestly in that price range you're going to run into a lot of issues with your clientele.With that being said you'll also have more cash flow per door to come along with those headaches so take solace in that hahahaCongratulations on the closing and here's to the next one 🍻🤘

My total HELOC available is $450K.I am looking to buy SFRs in the $125K range. 

There certainly are variances, but if you look at a 5-10 year snapshot of most portfolios, you will see the overhead usually ranges from 45%-55% when you have actual numbers for vacancy, maintenance, and capex.

Your new refinance should be in the 5.5% - 7% range, depending on the situation.

First, purchasing a house on the lower end of our price range for a live-in flip.

Together they become a self sufficient entity that financially will support each other when they need repairs and become vacant.

Would you guys say that the $200K+ range is specific to certain neighborhoods or is that pretty much city-wide? 

As I indicated I have had numerous offers to pay less, and initially I was seriously considering switching to get something probably in the 5 to 6 percent range.

After 35 years of investing and living through three market and one real estate crash,  I have learned that the key is to stay sufficiently liquid (so you do not have to sell during inevitable downturns) and diversify your assets so that you have eggs in more than one basket.