First 4 Plex Offer submitted....Inspection Report need guidance

[Alex Rodriguez]

Ive submitted an offer and it has been accepted 20k under asking price 555k.

There have been 2 buyers in escrow that then fell out at 575k. Finally the seller agreed to lower the price and has accepted my offer at 555k now in escrow . The sellers agent has included the previous potential buyers inspection reports (Roof, pest, and entire property) This is my first time making a purchase and am extremely hesitant to pull the trigger based on what im seeing in the report now. For those of you with experience what are the reg flags on high cost items? 

What is worrying me the most is the leak in unit 3 going down to the garage and also how the interior is painted and cant be determined if its had a leak in the past. What are your thoughts? My realtor is saying the leak doesn't seem to be a big deal but Im not buying it it along with all the other expenses i will have to put into it overtime. 

Below is the google drive link to the report

https://drive.google.com/file/...