Pick up any of the Biggerpockets books in the store, they all very invaluable. 

Wells Fargo, US bank...EDIT: Refrain from applying for a mortgage pre-approval online.

However, using the 50% rule and checking out some online commercial loan calculators, I believe the deal could work, depending on what kind of interest rate I can get.Please correct me if I'm wrong.

The park is 17 spots total with a small 16x16 (estimate)  metal building for storing stuff. 

Do you have a website or any online reviews?

In Texas, protests need to be filed by May 31st and most counties have access to online appraisals to check the values

Can you pay rent online?

If you take 'adverse action' (decline them or request a higher security deposit) on an applicant, you should provide an Adverse Action Letter to the applicant (many templates/guidance online etc).If you don't have acceptance criteria and appear wishy washy, it may appear (at times) as discrimination -- even if you're trying to be nice...

It has everything you need including free online videos and courses for you to watch and learn from.

Go on line I'm sure they will give you direction there.