Then, take the cost of replacing the items and divide it by it's remaining or useful life.

Anything remaining falls on the seller.

For example, many people rent their properties out during the cooler weather months for like 5 to 6 months, then rent it out as a vacation rental for the remaining time.

Took about 4 months to negotiate the deal because it was tied up in a multi-property package deal.

However, it remains to be seen if this option will be carried out in good faith.

We screen very thoroughly but stuff happens and things can change having the flexibility of not being tied to a one year lease is great, and besides our vacancy rates are low-about 1.5% max

Built after June/1976, on a permanent foundation, some states require hurricane tie downs, and the well and septic are within legal distance form tank/home. 

You have their deposit, itemize the damage and the prorated rent (30 days) and return any of the remaining money. 

It's referred to as illegal "tying". 

Driving maximum rent is usually tied to condition and location, but there are other factors...like the current market.