@Breeze Xue Despite what you hear about tax sales they can be extremely competitive.

Areas with lower sales volume and inventory are often highly desirable but provide few potential opportunities for flips and have a ton of competition.

It's a lot easier to get small multifamily now with the competition not being as high as before.

If you are self-managing, it is imperative that you are staying on top of rates; your property has to be market competitive to get bookings.

Also, there are tons of home-grown (free, shared) calculators other investors have created if you Google for "Investment Property Calculator".Analyzing The Deals - You, the investor, need to put on your blinders and practice underwriting (running the numbers) before you jump into a competitive offer scenario, or getting too far in front of your skiis with an off-market deal.  

As an Atlanta investor-focused real estate agent, I assure you that this market is highly competitive for flips.

Anything on the market, especially for single-family homes, you are in competition with other investors and owner-occupants. 

Price it competitively.

Ken start's by hitting the nail-on-the-head, before running off into fantasy land.... 

Highly recommend you spend 1-2 hours learning how to properly do a CMA (Competitive Market Analysis).Here's a big hint: none of the online sites have figured out how to take into account the different levels of finish between comparables!