It is a small additional fee over the credit check fee. 

My situation: $135k HELOC, ~$5k in cash, and good credit score with steady primary income as a Financial Analyst(meaning I should probably know this answer haha).

I want to make sure whatever property I purchase, will have a steady flow of income that exceeds my mortgage payment once I plan to rent.But, I feel that there are going to be some hoops to jump through considering I am 18 years old without any credit score.

My spidy sense started to tingle at "$500 each in profit," that's a lot and makes me think that either you're not properly accounting for all of your expenses or you have so much equity that your ROI is terrible.

You can leverage their credit and get them to qualify.

A SSN will be needed if you do a credit check.

I see where you are coming from but I like to find creative ways to get the biggest bang for my buck on vacations using credit card points (always pay off your card as soon as there is a balance) and finding the best deals. 

Tax Credits?

Usually, the only difference is that there credit score is too low and they dont have the full down payment.

I think going to banks, credit unions or anyone that could lend you money is a great start.