The policy provides a limit for the Existing building based on Actual Cash Value (depreciated value). 

A bit of rewording on your lease should cover you, but even with the current wording, it implies that the deposit is provided before the lease is signed"Roommate has to deliver to Landlord a deposit in the amount of seven hundred fifty dollars ($750) ("Initial Deposit") before move-in.

Could you please provide suggestions?

Shan, I might know someone in the area who could provide the services you're requesting.

As a contractor I provide free estimates, simply email the prints in PDF and 7-10 business days later you'll get a professional bid.

However, it does not provide the same coverage as homeowners insurance, which provides financial protection in case of damage to personal property, disaster or accident such as fire damage or theft.  

Can you provide a few more details like Size, zoning, general area, etc? 

Insurance programs or discounts provided by one company to the members of a specific organization (ie. trade group, alumni group, company employees, etc..)2.

While I still suggest you get an Attorney to handle it, they can provide you with the Notice of Trustee Sale and a scrip to read at the Auction as these do no vary by countyYou can also go to the  Aransas County Clerk's office website or any other Texas county for that matter  and print a Notice and tailor it to your property. 

As a landlord, do I have to provide as part of the lease the entire 6 acres of my mom's land to a renter since that is part of the property of the houseand cannot be subdivided?