Now, for the part I am NOT as sure about:My question is, can I maximize my profit by buying subject to the liens and negotiating them down or potentially having them wiped out? 

The house is free and clear with just taxes, insurance and utilities to be carried until it sells so that is not a major roadblock.

Third, is the carrying cost and payoff of any loans needed (if any) for the investment.Module #2:  Develop, using the freed up funds not used on Module #1 from the NLD, as "seed money" in an investment system of repeatable profits (i.e...flips).  

You need to take care of that roof so that person can come home after a long day at work and pay you rent.I'm a landlord for businesses so I need to make sure that business stays profitable and operational. 

I also sometimes get profitable properties for sale to investors, directly from the seller. 

Is this a major repair?

I have a few rentals, but the vast majority were fix and flip. 

Differentiating yourself with a friendly call is the difference between a 1% conversion rate and 3-5% conversion rate, which probably equates to thousands or millions more in profits.

The area is traditionally rural, but has brought in two major companies in the last few years and is quickly outgrowing its available rental housing.

Was thinking maybe paying him a % of the total job plus a % of profits but I've hear pro's and cons about giving a % of profits.