A bunch of little old Italian ladies are sitting on milk crates peeling potatoes and such. 

For seasoned, grizzled investors who plan to keep their money safe, that translates to yield means nothing if the principal is in jeopardy.By reducing my max LTV to 50% (including costs) I've eliminated most all investors who are unable or unwilling to offer property that attracts my money.

The same issues arise from an insured loss.Liquidity can be an issue, while some little old lady may have agreed to tying up her money, all she needs to do is say she didn't understand, the judge decides there was no meeting of the minds (since she lost hers) and you need to cough up her money before the deal matures.

But since you brought it up...If, and thats a HUGE IF, Illegals were sent back home, either the fields wouldnt get picked or wages would be increased to attract LEGAL immigrants or US citizens.

Anything you can do to make your offers more attractive and stand out from the others will help increase your chances of getting them accepted.

Areas that aren't "war zones" that would attract better tenants and less vacancy rates.

I want it to be attractive to them and at the same time affordable for me.

In my area I find a lot of 6-flats/6-plexes that do not have central air, despite the fact that it is a feature which is highly attractive for prospective tenants.When I try to search the web, including BP, it seems that almost no one talks about putting in the money and effort to install central air in these units.

If you are just trying to help a friend and are not receiving any gain (money or other consideration) then I wouldn't worry about just trying to help them put it on the Internet to attract a buyer.

For instance, knowing where the load-bearing walls are, knowing what types of tenants the property will attract, knowing the routing of plumbing & condition of the sewer main, knowing how noisy the street is, knowing that the house has a serious settling issue or water diversion problem, and--importantly--knowing how the property could be changed to force appreciation/rent.