I've been informed that the extent of validity of the purchase agreement has lapsed (45 days)  and an addendum must be added to reflect the new interest rate. 

Having the lease accurately reflect the current ownership will make any future written notices and/or legal action much cleaner and clearer. 

To do the 13 hr shift we're talking about here would require the daughter to be an adult, or 18 yrs old.I would never rent to travelling nurses in any case, but if you continue to do so, Wendy, I would definitely change your lease so that the wording reflects your desires for the property.

Your lot value would decrease, and you wouldn't be able to use similar Duplex lots as comps.Also, an appraiser may believe that a property will increase an "estimated 10%", but that also won't reflect in the appraisal.

Might be true and If the property is empty a swag on rent is more possible but with tenants in place it's harder to believe that those rents don't really reflect reality for the property as is. 

., and the pricing of the Multi-family apartment reflects this.

Here's a quote from an article in yesterday's Tampa Bay Times that'll give you a sense of what's happening:  "The numbers over the past few years reflect a more healthy and sustainable real estate market," says Hillsborough Property Appraiser Bob Henriquez.

The way people get caught is when they change their insurance coverage to reflect that the property is a rental (which you SHOULD DO, by the way, or else a LOT of potential issues will NOT be covered). 

The sun reflects off the windshield ands glares into my front window.

Therefore, once he is gone - you should not have to worry about replacing the locks being considered constructive eviction (as long as you give the keys to the other tenants that is....)YES, you should definitely issue a new lease to reflect the change in the named tenants.