I work with a lot of new investors that set there goal at turnkey rental properties and it is individually for every one , I recommend out of state when prices in your area are like that of cours (im from LA so know what you mean) and I went to FL secondary market for turnkey investment and have over 150 homes there , dig into good areas and try not to leverage a lot , start small and grow with experience look for10 and up cap rates and for SFH that are Rehab . many great cities are on the rise Big hint is the word from the banks about their inventory like where I am now.

Do I have to look at each property individually to know the value of the property, outside the assessed value given it by the county.

It's the most comprehensive guide to buying an MHP smartly, and is authored by one of the fastest growing MHP owners in the country - they own like 200 MHP's.http://www.mobilehomeuniversity.com/mobile-home-park-investing-books-and-courses/mobile-home-park-due-diligence-manual.php

Individuals who change jobs frequently, but who are nevertheless able to earn consistent and predictable income, are also considered to have a reliable flow of income for qualifying purposes.   

Other than that, each house is individual.

I have a few low income rentals I bought a couple years back. I have someone who is interested in buying one house as a private home. Here's where it is getting complicated:- I bought the houses in a package but still...

A true hard money lender is loaning on the property, not the individual so if your deal is straight the money should be there. 

Like multiple shotguns bought by investors and each been refurbed and given a different pastel, individual houses just bought and heavily updated, the tenants are slowly changing the demographics (eg not poor and black, but young and white), and so forth.In fact, the pastel thing is actually infectious.

The prices charged by CPAs varies based on location, expertise and your individual tax/business circumstances.

If you can individually isolate the water supply to each unit and each fixture within each unit, you should soon be able to eliminate/identify subject plumbing branches.Last year we had the water bill at a property triple during one quarter.