Maybe I'm a suspicious person who is reading something there like don't make repairs.

While we don't know anything about the specific lender you're dealing with, there are enough red flags in what you've posted to be suspicious. 

I have just had two applicants that one does not meet my criteria, and the second does but the situation sounds very fishy and suspicious. 

The sophistication of cyber criminals has increased tenfold over the last several years so you have to be suspicious of everything.

Annual around $5,450.5,450/30,000=18%Personally, I'd be suspicious, but if it checks out, I'd buy it in a minute.

Now I'm find a property whose potential ROI seems unbelievably high (property tax and HOA fee seems suspiciously low) and I wonder if I miss any factor to consider.

Lastly, if you have a good relationship the neighbors of the property, ask them to let you know of any suspicious activity on the property. 

I'm not a Real Estate investor yet.My primary motivations are: to diversify out of 100% financial instruments, to take advantage of depreciation expense on my taxes with rates due to increase, and to build wealth.I am willing to suffer lower returns to eliminate hassles.I am very suspicious of gurus and get-rich-quick schemes.I'm trying to find someone I can trust to help me find properties and someone to be my Property Manager.

I'd be suspicious of the fact that 2 months that went by first.

Marcela Rojas the most important thing you need to do is to be suspicious of people that want to sell you something.