To make up the difference of the total price, I used seller credits, lines of credit, and second mortages on other properties. 

Here are a few suggestions on how you can maximize the wealth of information available: Check out the blogs and podcasts, or take advantage of the search feature (magnifying glass).

If the price was right on Turn-key maybe, but probably more of the fixer-upper that can be leveraged later on for additional property or sold for a nice profit. 

Especially if you're doing enough volume to get good discounts on products.

Are there any options out there that won't tear away the margin on flips?

I mean come on!

I've separated out electricity but not water (never heard of sewer being separated) and I've always had separate gas meters on my properties but have separated the heating system on one.

I funded a ADU project on a property, the city found a loophole to restrict ADU to lots of 17K or more and huge set backs (property line to housing wall). 

I love being on the other side charging everything possible on a credit card but there’s no reason to accept them.

Today I would probably figure out to make money online with AI, that's an opportunity that did not exist in this form.