For some groups, if they are aggressive in getting deals, they might offer discounts on their PPP plans to get more business. 

Also I only had 2 quotes from two different plumbing companies to repipe, one quoted me 72k with 8k discount, one says 40k. 

If the investor acquires any of the other liens on the property--such as subordinate mortgages or judgment liens--at a discount, then the redeeming party must also pay the full face amount of those liens in order to redeem.Alabama law is very clear, it is the value of the improvements, not the cost.

Then discounting that value by a certain amount or % probably makes sense, since a potential buyer may discount it due to the presence of the MHP (mobile home park).

I was purchasing at discount (discount from appraised value), it had a significant value add, and was in a market that neighborhoodscout shows 10/10 for this century. 

Yes, it can feel like "wasted" money on months where rent is auto-paid and there is no maintenance to be done, but when you get a bad tenant or two or when deferred maintenance finally catches up to you, they certainly earn their keep.At your scale, you might be able to get a bulk discount with a good PM, especially if you can show how well your current systems are working and how they'd be needed less than usual.

As a note investor, we rarely if ever originate loans for owner occupied, we would rather buy on secondary market at a discount. 

I am not discounting appreciation but my goal for now is cash flow. 

My guys were also able to remedy the basement wall that looked like it was going to cave in when I bought it for a discount How did you finance this deal?

The layout of the lot would have to be just right (for example a corner lot) and the main house may need to be discounted depending on what's happening there (for example if now there is no garage, part of the backyard was chopped, etc.).