Leaving out auction and foreclosure costs for a second, when you write that check for $220k the trustee is going to pay BigBadBank the $175k they are owed first, then he's going to pay LittleBadBank the remaining $45k, and you will get a clean title as the process is going to wipe the slate clean.

Will the interest rate remain 0% until you sell the flips?

My vision is to bring together motivated people to support one another and potentially form an LLC for group projects as we grow.If this is something you might be interested in, I’d love to chat more and see how we can help each other on our journeys.

Your payment may remain about the same as the original deal!

Presumably because the overall majority of BP members invest only and the US and they're smart and well educated and can tell when people are trying to genuinely help them or are motivated by trying to get business from them.2.

In 4 or 5 years you will have appreciation and a solid number of years with 2% remaining.  

Be ready and willing to change locks and give remaining tenants a key3.

So the water damage in the ceiling remains.

Most sellers that are open to selling you a deal off-market are just like I was with my rentals: the way to motivate them to sell is to give them a price HIGHER than they think they can get on the market.  

Let's say at 6% over 30Yrs will be about $960 per month(Principle/Interest) with the remaining  interest only portion $40K costing roughly $200 per month. $1500- $960 + $200 IS $340Cash in your pocket after everything roughly $1500-$1160-$340 which is not bad for a 100% financed deal(INFINITE RETURNS)Now, If you ran this analysis on a 1% deal as @Nicholas L. mentioned you will undoubtably end up in the red each month.All the best!!!