I'm dealing with a "C" class neighborhood and just need a screening process that I punch in their information and I get the results, of course with me collecting an application fee.

You just can't take title until after your sale.Regarding the number of replacements there is no limit on how many you purchase. 

You can form the LLC via your state's government website and pay the applicable fees listed.

We get beat out all the time by first time home buyers (not really applicable to this forum, but that's who our competition is).

Which in Vegas with 12 homes is usually limited to 1-2 water heaters.

Marketing, showings, preparing the property for rent, dealing with HOA’s, processing the application, etc.... in addition, the Agent has to pay a referral fee out of that lease fee if another realtor brings the tenant to the table.

So, you'll need to discuss with each lender about their terms, fees, and what they'll need for loan applications.

The bank I used believed this rule wasn't applicable because once most leases were up after 1 year a number of tenants would be moving out. 

We may need to get creative.We’re going to need a good realtor :)Anyway, we have so many questions, too many for one post, so I’ll limit myself to two.

You need to do an accurate loan application with a lender and have them run it through Fannie Mae's automated underwriting system (called DU).