Have you heard about Redstone title services?

RMLO comp is a highly guarded secret.. they also make yield spread premiums and servicing release premiums that you will not see.. 

Appraiser will actually include like properties in his/her report so comps should be included in his service.

And finally, is this a typical service that's offered to investors?

If you can find a reputable park that provides legitimate management services for a reasonable fee, and can also provide rental history so you study the analytics, and the return on your investment is worth it, go for it! 

Asking Price: $125,000Gross Scheduled Income: $15,900/yearLess 5% Vacancy: $795 Operating Income: $15,105Less Operating Expenses: $7,630Insurance (1% of purchase price): $1,250Property Taxes: $815Management Fees (10% of scheduled income): $1,590Repairs and Maintenance (5%): $795CapEx (10%): $1,590Misc. (10%): $1,590Net Operating Income: $7,475Less Debt Service: $681/month, $8,172/year (assuming a 5% down payment on a 4.5% mortgage, with .8% PMI)Cash Flow: -$58/month, -$697/year

@Martin Saenz  I am guessing that each pool will stay with a single large buyer/servicer. 

The two lots were owned by the same person who after foreclosure, got his back end in gear and paid the liens off on the rest of his properties - so without noticing, I got 18% interest (less the service fee) on three other lots plus my principle back.This year, we sent out noticing on one lot. 

On the plus side, that quirkiness supports more locally-owned businesses that offer better service than national chains.  

What kind services do you need?