@John VuI’ve been really working at understanding and applying the metrics used in investing for a while now and I feel like I’m wrapping my head around them a bit.

Since they were existing tenants and you do not have a no pet policy it is not a issue of denying the pet but rather whether the pet fee applies.

The only thing I could think applies is that it says no Warehouses (?)

My understanding is, none of the "Rules" are meant to apply to every property in every market.

I was wondering if the same rules still apply with it just being a simple fine or if it could be a little worse?

I would think that since your "use" was created when the park was initially built that the zoning rules from that time would apply not the current rules because you haven't changed the use. 

@Ben Leybovich Yes, "caveat emptor" always applies.

do i pay off most debt under the 30% and use my savings... then re apply?  

It also eliminates the need for appraisals, and the annoyance of detailing every minor financial transaction while you apply for a new loan as well as loan origination costs etc and since you don't have to deal with the bank  you can close a lot faster.

This is 100% the right answer.For a primary residence, the Fannie "cap" of 10 financed properties does not apply.