Are there any services that simply do that for a flat fee? 

There are a lot of good deals on 2-4 units right now but one thing I would avoid is the few townhomes and Condos that have high HOA fees.

I do drop down significantly, but I factor in what it would cost to run my place on a day-to-day basis and make sure not to go lower than that.

. $95 flat fee for a basic listing.

Proper tenant screening is one of the most important factors.

It's a significant rating factor.  

Rehaan - Your question is dependent on several factors, all of which are very important to consider when selecting a property you wish to flip. 

Most work this way: Rates: 9% to 13% (Most Deals are 11-12%)Terms: up to 36 Months (Most Deals are 6-12 months)Fees: 2-4 points(%) of loan amount paid at closing (Most Deals are 3 points(%))Minimum Loan Amount: $50,000 (For loans less than $250,000 $2,500 minimum fee)Max Loan: 65%-70% of After Repair Value(ARV)100% Rehab Financing Available (Require 20% of purchase price down payment or cross-collateral)Closing Timeframe: 48 Hours - 3 Weeks (Most Deals are 2 Weeks)NO PRIMARY RESIDENCES, NON-OWNER OCCUPIED ONLY, BUSINESS AND COMMERCIAL USE ONLY.

@J Shoe I will start by saying consult with a personal attorney and CPA (and have them work together.)Typically people buy in an LLC just to keep their name off the record and for asset protection and operation agreements.As a sole investor a lot of people will buy in their personal name so they can more easily obtain quality financing, and then move the asset into the LLC.A lot of people of California use trusts (DSTs) to hold the asset, so they are not contributing to the problem of over taxation in CA, as CA has a franchise filing fee of $800 every year for each LLC.Just some things to think about, but find the professionals that can tailor a system for you personally.Cheers

I also pay a 1,000 finders fee for any unlisted property that someone tells me about that I buy.