You need to consider the money you're going to lose for holding costs, property taxes, HOA fees, utilities, insurance, any surprise maintenance expenses that may arise.  

I think you will be surprised as to how many do have smartphones. 

You can get a realtor to send you MLS listings using filter criteria.However, I would apply the full millage against the price you plan to offer (to get an estimate of your future tax bills) so you don't get surprised with a new increased tax bill the following year.

Even if you choose to manage the property yourself, you should still account for the costs (e.g. gas, time, etc.) associated with it.As a landlord, you can expect to encounter your share of surprises, but there is no need for expenses to be one of them.

I am wondering if I should hold it for a while in rent it out for a few years before selling to combat any surprises with the appraisal.

Surprised at condition of house.

Add in the fact that I was determined to be cheap at first and I'm surprised I did so well.  

It always shocks them (but it comes as no surprise to you) when we say we'd just start selling our houses to them at the market prices.  

AND YOU BE SURPRISE RIGHT OVER THE PHONE, HOW MANY DEALS ARE MADE ....THE PHONE...

Surprising, actually.