Some may have the best intentions, but not all (with no reference to who has posted above, they all could be solid).

Intent to build and use as a primary residence?

This is outlined in Title 18, Section 1725 of the United States Code, which states that any person who knowingly and willfully deposits any mailable matter such as statements of accounts, circulars, sale bills, or other like matter, on which no postage has been paid, into any letter box established, approved, or accepted by the Postal Service for the receipt or delivery of mail matter on any mail route with intent to avoid payment of lawful postage thereon, shall for each such offense be fined under this title.Violating this law can result in a fine for each piece of mail that is improperly deposited.

What are your intentions with the property (will you occupy it from the start?

I would never advise my client to buy with tenants in place with the intention to get them out unless they have the cash and experience.

You also have to have the intention of living in it for 12 months. 

Two important considerations are if it's a cash deal and if your intent is to rent or resell.

If you feel they're being too harsh, think about their intent.

Cheap faucets, doors, knobs, lights and flooring show your intent. 

BUT i wouldn't buy with the intention of selling in 18 months. you never know where the market will go, your closing costs could easily eat up the equity you built up, etc.