I would add the addition handrail and if she insists on adding the runner, let her, but state in your documentation that you did not approve it nor are you going to pay for it.  

My first step would be to contact the local building authority and see what documentation and process they take to approve a mobile home park.

I'm just wondering what are the typical documents that a legitimate company will ask for?

Sounds like you are only a few documents away from setting it up as a proper property management company.

I accepted an application from a prospective tenant who, after submitting the application and paying for the credit history and background checks, told me that the earliest move-in they can do is April 12.

http://www.cicchicago.com/documents-training/prope...http://www.cicchicago.com/Let me know if you need more information.  

Also depending on your finishes you may end up with renters that have a criminal history.

Tenant sneaks very important clause into his landlord's lease.....yes,  the Landlord will provide a birthday cake on the Tenant's Birthday...http://news.yahoo.com/tenant-sneaks-very-important...

If your inspector flags the roof and you want a roof guy to look at it, but the seller doesn't want to give you time to get a roof guy out there, you should assume they are being shady actors, that they are trying to hide something, and you should 100% walk in 100% of cases.If the inspection results come back clean and/or only revealing things you already knew about from the seller disclosures, great that is how it is supposed to play out and you've got an honest/forthright seller. 10 days is PLENTY of time, unless the seller is being shady or is ignorant of the home they are selling, which is THEIR fault.The California Assn of Realtors Residential Purchase Agreement, in whole, is a fair document IMO.

When we make an offer, we include a full complement of documents and an earnest money check.