Finding houses at a price point that gives you a chance at legitimate profit is the real bottleneck.

I am reaching out to seek your expertise on potential strategies and avenues to secure the necessary funds, allowing me to present a well-prepared and legitimate offer to my family friend.

In theory everything needs to be permitted if you want the city to legitimately view your house as a two separate units.

As look as the construction looks legitimate, I'm sure it is fine. 

My booking was a legitimate direct booking, with an employee of a company on a work assignment. 

Personality, attitude, etc. are all legitimate grounds to reject any applicant without having to do any farther screening.

Just because you think it should be covered or paid for, doesn't mean it's legitimate or valid under 'said policy!'  

Its difficult to legitimately "assume" a loan unless its VA and only a fool would let you assume their VA loan. you'll more than likely assume it subject to and then its the old get your deal done before the lender accelerates Wack amole game.

I ran some numbers on a potential deal using the tools provided on bigger pockets however I was wondering how to find out if the numbers are legitimate and the process I need to use to get an accurate evaluation.

Especially if they tell you they want to pay you up front and then they will arrive later.If someone has actually showed up, looked at the place and wants to rent it, then perhaps its a legitimate deal.