Not a bad play since I am 10 miles outside of Boston, 1/2 mi from Salem State University, and 0.7 miles from downtown Salem.One day I thought to myself, "you know what, I'm going to throw the 1 bedroom unit on the market for $1,600 and allow pets to see how much action I get.

I do not intend to charge my tenants a pet deposit or monthly pet rent.

Things the agent will want to know:age of the systems (roof, heat, plumbing, electric)if older, is there any knob & tube or aluminum wiringcircuit breakers or fusesany underground tanksdo tenants have pets (if dogs, what breed)what alarms do you havepitched or flat roofany claim history (check with existing owner)

With companies like Amazon, Dollar General, Shine Medical, Mercy Health and ABC Supply creating many jobs and investing back into the local economy, clients are seeing phenomenal returns.

It basically indicates the ADU is to be approved if there is no Heath and safety issues  (2) The owner of an accessory dwelling unit that receives a notice to correct violations or abate nuisances as described in paragraph (1) may, in the form and manner prescribed by the enforcement agency, submit an application to the enforcement agency requesting that enforcement of the violation be delayed for five years on the basis that correcting the violation is not necessary to protect health and safety.(3) The enforcement agency shall grant an application described in paragraph (2) if the enforcement determines that correcting the violation is not necessary to protect health and safety.

Less $ down is a key to your long-term health and growth here.Moreover I'd ask these:  why these 4? 

The current owner said he bought the park in an auction last year and he heard the water well was neglected and the health department shut the park down.

I would hesitate calling it a fee since a security deposit is at least partially refundable, unless you are referring to something else like a pet fee, which is often non-refundable. 

The seller is an older woman in poor health conditions - currently in hospice - and her only daughter is trying to organize the whole transaction.

Think of all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.