I am a Independent contractor. 

Question:  when I submit it back to the seller would you typically ask the seller to take care of the larger issues, like structural issues, new furnaces and new electrical service or do you ask for a price reduction? 

I am looking forward to interacting and learning enough from everyone so that I may also be of service to new members someday.

As landlord, I subscribe to such services.

You look at the cost of providing the service versus the additional revenue you need to make a profit.

My goal is to be financially independent and not have to rely on a paycheck all the while being able to build a portfolio that can be handed down to my 2 kids.

Then the LLC never becomes an independant financial entity, even if it holds income?

There are some scenarios where you might be able to have a Solo 401k with part-time employees or independent contractors, but you'll also want to look at how long you'd expect to remain eligible if this applied to you.

The AC has no problem and since the service, we found sometimes the air is not cold enough.

From the IRS website https://www.irs.gov/taxtopics/tc511"If you're a member of the National Guard or military reserve, you may be able to claim a deduction for unreimbursed travel expenses paid in connection with the performance of services as a reservist that reduces your adjusted gross income rather than an itemized deduction on Form 1040, Schedule A.