, I recommend you separate yourself from the equation and answer the question as if you were advising a colleague or younger sibling: What would you tell an imaginary advisee to have in place before they go all in (imagine they have the same business plan as you): Savings account size (measured in # months expenses it will cover)Emergency fund sizeWorking capital to fund the business planKnowledge level, in which areas of REI Support system, network (or "tribe")Lender or investor relationshipsThen turn the lens back on yourself. 

Having read your other post about the situation,my condolences for your situation.It seems your siblings are out to get everything they can and disregard any concern for your welfare or the stress it might be causing you.

She doesn't currently make enough on her own to cover the rent comfortably, but her brother is willing to co-sign to make sure the rent is covered.We are thinking that we restructure the lease so that there are the two tenants, each co-signed by their respective siblings, so that we have 4 people that will be responsible for making sure the rent is covered each month.Would really appreciate some advice about what to do and would like to hear why our plan isn't a good idea (and why). 

I bought this house for my mother and siblings while I am in New York.

Get everything in writing, signed and notarized so that her siblings and your siblings can see that this what she actually intended.You could set it up as a purchase & sale for whatever amount you felt you wanted to.

In Quebec you can't evict tenants easily, the only way to do so that I know is if you retake the unit to live in it or for your parents/siblings.

Ideally, the cash I put up for the lien would be carved out of the share of the sibling who was living in the house. 

I have had a storm hit while in a similiar situation who pays for the uncovered damages was a issue seen differently by some siblings

But of course would like to know if her and siblings are now owners of this property.Let’s say the daughter is the inherited owner, Where would the daughter go to obtain the key!?

I have a property in the Stone Mountain area that I manage/own along with four siblings.