But it would give you much more time to find all the other units you need to "survive".My personal retirement goal is 40 units.

If newbies are unable to handle someone telling them that a deal is a bad one, then they won't likely survive in REI.

Even those that survive will have their values effected like you pointed out in your original example.Same building worth the same because of the 15% rate.

Here's my two cents worth....It all depends on what your business model is.

One of my business model is to buy properties and sell them with owner financing or do lease options.

Javier,A DCF Model is a fairly straightforward method to estimate the present value of all future cash flows, including the reversion.

(There have been slimy lenders who may try to hide terms, and there are probably still some but, fortunately, most of them did not survive the last crash and the penalties for unethical lending are much worse now then they were 20 years ago.)

They have owned stock that goes up and down and some have also owned more intensive type assets and are simply tired of problems in exchange for higher yields.They are simply in a mode where they want to receive a monthly check and do nothing.

In Wholesaler mode, I always use the 70% rule to evaluate the property. 

They tend to sell homes in between managing the houses for investors to survive.