Sometimes scratch and dent work, but I have had one poor experience with a refrigerator that had a lot of internal damage (like it had been dropped). 

with a BS in economics and minor in mathematics and currently working as an internal audit/compliance analyst.

Instead of 1-2 weeks international they opt for a week somewhere in the lower 48 or something they can drive to, which could even help some domestic markets.

The internal rate of return IRR and Net Present value NPV are concepts you encounter frequently when discussing capital budgeting and also is utilized with real estate investments.Regarding your question..when would you use an IRR?

You will also need to educate yourself with international lending laws.  

 - Knob and tube wiring, screw-in fuses, low amperage feed to building - The historical designation prohibits freedom to renovate with modern materials - unlined chimneys - egress does not meet modern code (e.g. window opening size, 2nd egress from bedrooms) - cast iron internal waste or water feed lines - outlets are out of code (GFI for washers, over counters, in washrooms) - hardwired, interconnected fire alarms may now be required - old underground utilities or oil tanks that are not known - dry rot in floors from old water leaks - trees have deep roots that entangle waste lines - nothing, absolutely nothing, is plumb anymore. 

@Thor Bolle I see you have a good comment above already but try posting in the "international" forum as well. 

But your Internal rate of return is huge. 

We have a locked in $ with a landlord which means our internal labor time is locked, to make $ we have to use less to create a profit margin, and enough to mitigate those times when it's more.

Same thing applies if the water heater is obviously screwing up in some way, and the tenant wants to shut off power to it... it won't be obvious that both tenants need to turn off a breaker to shut it down completely.You could fix this by installing a disconnect switch next to the heater, but if the heater works like I think it does, it would have to be a fairly unusual type of switch - a 4PST (four-pole) switch, rather than the common 2PST (two-pole) switch.2: Depending on how the heater is wired internally, a failure *might* cause it to connect the two separate feeds together inside.