I’m looking to pull equity from a property, but I have a great interest rate that I don’t want to lose.

It sounds like a single family house where you will be living in the house(personal use).Therefore, you may not be getting the tax benefits you think you are.Consult an accountant.I am not sure why your sister would agree to this as well, she is losing $170,000 in this transaction and she faces the possibility of you increasing her rent.You also have to charge market rent or close to market rent or it is all deemed personal use.

Then I spoke to him over the phone later that day, and he told me, that unless I answer him if I wanted to buy the property within a few hours, I will lose the chance to get this property, claiming that there will likely not be such chances again in the future.

Waterford, Houston, TX - Sponsors: Community Investment Properties, Legacy Wealth Holdings, Djuric Family Office - the claim is this is the first of their deals to lose investor money.

You might work with someone if they lose their job and let you know, but find another job within a few weeks. 

I feel more at ease losing this deal and finding my client a better option.

Expect significant renovation, so having a reliable renovation crew is worth its weight in gold.

The interest that it does accrue is money you don't lose, but rather it does go back into your investments. 

I am assuming you know it will lose money most likely?

Not worth it to me.In my area if the pool has a powered safety cover that can hold body weight, then a barrier fence is not required.