A lot of extra unnecessary costs. 

There is no circumstance in which a No Pet Policy can imposed with a service animal.  

That unnecessary cost and inconvenience is borne by the tenants.

Around me, the cities impose a number of additional rules, licensing, fees, etc.

Nope, that's their job, and while I find it a completely unnecessary service, many people out there would be completely lost without a realtor.

The restrictions are imposed by the park owners to restrict competition and are usually successful in making an investor's job difficult. 

and its unnecessary and anyone doing business with you should know that. what you did wasnt creative marketing, you offer your self up as a professional you should be made to adhere to standards. 

@Steve Babiak The real shame is, instead of targeting sub-standard housing providers, they're imposing fee increases and increasing regulation for all providers.  

Most states calculate assessed value at 80 percent to 90 percent of FMV, and then impose a 1 percent to 2 percent annual property tax on the assessed value."

I'm an investor with over 15 years of experience and I don't have an LLC and I'm of the opinion that they are simply unnecessary 90% of the time.Do you have a business partner?