I would avoid this if its your first acquisition  but you also appear to have enough cash to complete the purchase without financing so you wouldn't necessarily be at risk of losing your deposit, only incur additional transactional costs.

When things go south, you'll lose the business and the relationship.If you decide to move forward, I recommend you talk to an attorney and develop a strong partnership agreement that protects all parties, gives everyone a way to exit, etc.

Understood that some of the stuff on the listing is their proprietary information but this results in us losing all the reviews. 

I think a lot of folks here responding are losing sight of the point of what you're saying which is that you plan to raise rent because you know you need to charge market rent AND also that you feel saddened by the fact that this is at the expense of a woman who is living there.

So many investors lose thousands, or even tens of thousands, every year through poor management of their property.

You may get a higher CoC, but you may lose out on significant appreciation in the long run.  

Would they write checks to every owner if they lose?

There were comments that the sponsor wrote they did not believe in fixed debt and went with adjusted debt because you lose the chance for rates to go down.

Make more money, buy more buildings, and repeat.These folks have compounded their wealth significantly faster than their W2 counterparts since they don't lose 30-50% to taxes each year.

I lose a lot because the google link looks scammy.