My TurnKey Investing Strategy. Feedback please.

[Andrew M.]

So, I know this has been discussed a million times on this site. I just wanted some feedback on my strategy over the next 5-10 years or so. 

Here's a little background about me. My wife and I are both employed (W2) and make about $60,000 a year in household income. We have about $30,000 cash currently and no debt. Our monthly expenses are under $2,000.

My plan is to invest in turnkey SFR in the Memphis market. I would like to buy between 15 and 20 gradually over the next 5-10 years. I expect the houses to all be between $100K-140K. I expect these to each rent for $800 - $1,200 per month. My cash flow goal after ALL expenses (including PITI, management fees, all maintenance and a reasonable allowance for vacancy) is an average of $200 per month per property. My plan is to finance these with traditional mortgages, 10%-20% down.

Here's what I'd like to know: 

Are my cash flow goals reasonable and achievable? 

Is there another market that you think would work better for my strategy?

Is securing that many traditional mortgages possible?

What are some difficulties I may encounter? What suggestions do you have for me?

If some experience property investors wouldn't mind sharing some wisdom I would greatly appreciate it. Thanks for your time.