Sahar,I guess I am just too old fashion. 

Having help is the ONLY way I'm gonna get my sanity back and not feel guilty for going out and hanging out with friends because I know that the business is still being kept up in a timely fashion.

At the same time doing all common areas in like fashion.

The old-fashioned rent box works well.

I know a warranty can cover the costs of major systems and appliances failing just fine but I've also heard they perform regular maintenance things like toilet clogs in a poor fashion.

Fingers crossed these tenants eventually get evicted in a civil fashion. 

You might have some cool penny tile or other old fashioned stuff you can leave as is, clean good and apply a sealer. 

Yet they're very old fashioned and risk averse, so I'd have to present this well.

Fashionable is gray or dark thick(25mm, 15 mm) with good backings. 

Historic timbers can fetch a pretty penny and are very fashionable in some design circles.