Seller agreed to a significant price reduction as part of the repair negotiations on our apartment deal.

I am planning on building a ADU in my backyard and I was wondering if I should just hire a general contractor and pay lot extra or do my own project management  by hiring individual contractors/sub-constractors to do the job.Like - Arhictecture and permit person, plumber for all my pluming including addition sewage and water lines , foundation and framing contractor.

In many cases buyers want to do their own updates, so they won't give you anything additional for the "upgrades". 

@John West  It's sketchy that you would have to call the additional $25k "commission" if it's really being used for the down payment. 

Thanks for the tag, @Steve McGovern, but I can't help with this as it is both a residential (not commercial loan) situation, plus any additional funds would be in 2nd position behind the bank providing the original 203k loan.

I am in the middle of a purchase for a two family property, definite add value with the addition of one bedroom to both units.

These are professionals with additional training and a stricter code of ethics.

That makes my job easier because I buy "off market" and when people who might otherwise list, see price reductions on the MLS they become more flexible in selling to me.

My only addition would be to search and analyze deals as often as possible to help you learn what a good deal looks like.

Just cash your checks.As for an up charge due to the additional occupants; charging additional rent for his girlfriend & child would fall under familial discrimination.