Labs and Golden Retrievers are great pets but "large".

You've got huge migration from California folks looking for more affordable housing, and baby boomers by the dozen retiring and wanting to live out their golden years in warmer climates.

If you get a degree from MIT, Stanford, CalTech, Harvard, Columbia, NYU, Brown, Yale, etc. you are golden.

Instead of using some golden metric (everybody has their favorite), determine what you really want to get out of the deal.

You are actively addressing the leak issue, so you are golden--that means you are not ignoring the complaint. 

You should be golden.

It is ideally to hold the golden chicken forever and only eat the golden eggs.

Don't hide anything, be up front that the buildings could be considered separate, but both you and the seller consider it all one.If you find a lender willing to go along, you're golden.

1: They take any random person just to fill the place. 2: They lack the understanding for the reserves needed for repairs, tax payments, etc. 3: They think renting out a home is the golden path to early retirement while not realizing there are many months that you are likely to lose money, not make money. 4: Cash flow is lower on home rentals than newbies realize. 5: They think they can just sell it and buy another new home if things go wrong. 6: When things go wrong they become weak minded and give up. 7: They have good success with their first rental and think they are smarter than everyone else and this will be easy for them (not true as there will be some major flops). 

@Wouter CeyssensRemember the Golden Rule.Do unto others as you'd have them do unto you.Real estate is a small world.Protect your reputation.Be a good person, always.Good luck!