Is that ethical or normal?

Let us also assume that the home does not have to be moved, is it a decent location with population, decent size/age/condition, and the parks application process and ethics are normal.When it comes to purchasing a mobile home with or subject to the underlying debt within of a park, it is a bit tricky because in most situations the bank will not allow the owner's name on the title to transfer unless the lien is satisfied.

In most places it's actually both against state regulations and local broker's code of ethics to do so.

It's the same treatment I get from my mortgage lender, my insurance company, my cellphone provider, and any other professional business.Treat this like a friendship and you'll eventually find out your renters do not see the relationship the same way.

Just ethics are what is in question and my realtor said wanted to tell them what we were doing which is what messed the deal up. 

Taking aside your values and if it is ethical - in 99.9% it provides no added benefit if one is not needed.

Only certain things qualify for these treatments and it's things that aren't considered by the IRS to be part of the actual property essentially. 

You might want to see where the water lines are coming from in your unit, make sure that you have sealed around that as well.In my condo association, they determine who is at fault for the treatment of the building by bringing in a third party inspector (pest control) and whoever the pest control determines to have the worst/biggest infestation of (thing) is generally at fault.

I was outraged to see some of the quotes I heard back to do a termite/carpenter ant treatment just on the exterior of a house.

I do underwrite cleaning the gutters and possible pest treatment 1 time a year (but I don't tell them that).