How clean does a diesel generator burn?

While you may get by with no capex spend for the next several years, if you need a new roof in year 5, you have burned through all of your reserves and then some.Same with your repairs and maintenance.  

I say that because you can get burned. . .even with allowance for vacancy, maintenance and CapEx.

Now, they generally don’t have to be lit with “the long match while burning your fingers”, like in the old days - you generate the spark with a piezo push button.  

I would advise to not show property addresses until you have it under contract but I don't know anyone who has been burned on that.

Not paying upfront is another critical factor that many people forget and get burned (and I am speaking from personal experience). 

We got burned with our Investments in India due to the Foreign Exchange Rates. 

I have all of the things in the example lease, and I added extra clauses for things like keeping track of keys and locksmiths, burning candles and grills safely, cleaning and lawncare, an expanded clause on not clogging drains, no pools, etc.

Some other posters have gotten burned dealing with crappy tenants and I understand their frustration with certain aspects of being a landlord, but it comes with the territory. 

(these type structures also burn like match-head in an instant too)If there are large baseboards with the plugs in them sideways they may pop off and allow access to the upright space in an easy manner.So you might not need to disturb the plaster if the electricians are clever about it.All of your your runs might not be the shortest from A to B but they can figure that into cable sizes.Although in an old house you might find the exterior wall spaces filled with, ground newspaper or some other 1970's (or later) insulation effort.Another factor is a large re-wire might trigger an up to current code setup regarding plug types, placement and number, breaker types, etc...If there are firebreaks (horizontal 2 x 4's) inside the walls, you might have to open the plaster (unless there is an electricians trick I don't know about).Pic 1 and pic 2 shows antique method of construction with some 2x4's open from basement to eave.Pic 3 show's a more modern technique with a floor between the levels.Pic 4 shows the hidden space behind an old tall baseboard (in some houses) that can make fishing easier.Which do you have--it was up to the original builder.Good Luck!