We chose these students because they must go through background checks and drug tests for school since they'll be placed in hospital and clinic settings for their rotations.  

You can have systems in place after trial and error so that the business will "run itself" if managed properly and with the right people involved.. 

Living together is a trial run for marriage anyway right?

If the landlord prevails those rents are turned over to the landlord after the trial.

@Garth GisselI have checked rentecdirect.com however the only thing free I see is a free 30 day trial.

While the letter from the clinical social worker, outlines the disability, the support required by the animals and lists 3 separate governing laws that allow these animals (ADA, FHA and rehabilitation act) in all three governing documents, it doesn't speak to the "fee's" just that they have to be reasonable accommodated.

We did a trial run on our own house which is 2100 sq ft.

(Source: Portland Urgent Care - and about every allergen and sinus clinic in the country).Your failure to manage to the lease after knowing that there was a cat on the premises could prove to be a defense should you offset the security deposit without having receipts from credible/industry trades with their findings noted. 

tenant A loves dogs but the building policy prohibits pets. one day, tenant A notices thru the front window that tenant B moved in with 2 dogs (a pit bull mix and a german sheperd mix) with the PM present and no issue was apparently raised; landlord even pet and played with the dogs. tenant A feels betrayed and goes out and buys a yorkie. landlord finds out and issues notice of breach of contract and to vacate or restore the apt to its pet-free requirements.tenant A contronts landlord and demands explanation as to why tenant B has 2 big dogs but tenant A cant have 1 tiny one. landlord discloses tenant B provided proof that each of the 2 dogs are emotional support animals.tenant A asks tenant B why does she have 2 emotional support animals, and for a referral to a professional that could also recommend 2 or 3 dogs so he can keep his yorkie and get a playmate for his and maybe even the yorkie's 'emotional support' each.tenant B is insulted and files a HUD complaint that landlord shared that she needs emotional support (per Fair Housing Act, landlords may not divulge that a tenant has any disability to any third party).meanwhile, tenant C whose toddler was soon after mauled to death by tenant B's sheperd mix, has just won a case in California Supreme Court finding the landlord to be a statutory owner of the dog since it was accepted onto the premises simply based on a letter written by a 'pet therapist' without regard - and consequentially, with negligence - to the other tenants' safety and thus responsible for $2,000,000 in compensation to tenant C for the loss of precious human life, regardless of whether landlord was negligent or not, and regardless of whether animal was a service/support animal or pet.landlord, having lost his countersuit against tenant B for vicious 'support' animal's lethal actions, files claim for his homeowner's insurance to cover the $250 million he owes tenant C but claim is denied altogether on basis that building had a no pet policy and dogs were not declared and the pit bull mix, though recommended, was never even licensed.last but not least, landlord receives summons, subpoenas, etc from HUD and appears for trial in Federal Civil Court. judge finds landlord guilty of divulging that tenant has a disability and orders landlord to pay the statutory $16,000 for one county of housing discrimination,  plus 300,000 in actual damages for the complainant (and of course, her attorneys fees) for she is emotionally scarred for life!

The results of the criminal trial are irrelevant to you as long as they are found to be at fault.