If the above doesn’t result in the tenant changing the furnace filter then focus on tenant selection/ screening.

advantage or disadvantage? 

Certainly, if your financial situation is more "complicated," than a broker might be advantageous as they could find the lender that would suit you. 

.: I see that my statement "I know they are lying" might have given you the impression that I am trying to maximize the return by taking advantage of them. 

I recommend first surrounding yourself with a good CPA, as I learned that by investing with my pension, I am not able to take advantage of depreciation--a massive tax write-off!

Reference HUD SFH 4000.1203k Consultant is required to be selected by your lender.

As soon as I started my Corporate job, I was told like many others to max out my 401k contributions to take advantage of my Employer match (100% first 3%, 50% next 2%).

@Joseph Grullon, His primary sale is probably tax free so I don't see any advantage to hiding that from a tax perspective. 

KORE Power, which was founded in 2018, said this would be the first lithium-ion battery manufacturing facility owned by a U.S. company.In addition to the 3,000 would-be KORE Power employees, the company estimated that the new plant would bring an additional 10,000 direct and indirect jobs to the selected region.

From what I'm reading - seems to be a tenant who's taking advantage of you guys but that's just my 2 cents.