However, with the normal wear and tear/ usage of the two main entry doors to the units foyer area, we have had more than 5 service calls on the locks (for batteries, lock mechanism not functioning, etc.) and both front door Locks have had to be replaced once already and I am thinking it is time to use a different Door Lock method. 

Hello Joo, Regarding your sewer line it sound like you need a mechanical sewer system.

This is a mechanism used to make sure general partners are aligned with the limited partners, but are not a good indicator of your true return, so I wouldn't put too much weight on this.

Some mechanics have a $40,000 toolbox full of all sorts of high and low tech stuffSome have a hammer and duct tape in a shopping bag.It's not always the right tool, but sometimes you may need to pull that one out.

Your wife is a US citizen and I assume you're classified as non-resident alien.Really this post is great to educate you on the mechanics of calculating taxable income for a rental property but it's focusing on the minutiae a little bit considering your personal situation.High level thoughts:-Does your wife have an FBAR and/or 8938 obligation? 

Mortgage liens will all go away as well as mechanic liens.

I also figure repairs to bigger assets would be much more complicated such as the mechanicals.

He found more rotten beams, mechanical issues with the heating, the pipes to the water heater was hazardous and can cause leaks.

I'm curious about some of the mechanics? 

My plan is to keep my current job as an Industrial mechanic, and invest on the side while still working my full time job.