In addition they have had to help out my siblings over the last few years and i feel that they see this as a way to help me out without just writing me a check. 

I have no sentimental attachment to this property (although I do like it) but my fiancé's father and siblings grew up there.

A sibling and I are interested in dipping our toe into flipping.

can she move out and rent a place closer to you or another sibling? 

My wife and her two siblings inherited a house from her parents worth about 480K, it's in a trust now I believe, one of the siblings lives in the house currently. 

But unless they are estranged siblings, I think this would create a conflict of interest.

One of my other siblings is actually responsible for this bill as he lived there with his family for 6 years and was supposed to pay the taxes and never did.

Sure, that can be real, provided it's actually a private lender... your wife, your dad, your cousin, your sibling.

I had shared the concerns expressed above, but as a parent of 2 boys and one of 4 siblings growing up poor, I would have really appreciated to have been taught the *financial literacy* component early on!!

I am considering a master lease and a letter of understanding with my siblings to keep the building at its unremodeled value when it transfers, and will buy them out at that time.