Finding a good and reliable contractor can definitely make or break a deal.

I would like to know which sites are reliable to do some market research on population growth, and income on zipcodes, and counties in Delaware.

Here are the Positives:Upfront Payment: The tenant’s offer to pay the full year of rent upfront, along with the deposit, shows a commitment and provides financial security for you in the immediate future.At least She was Honest in Her Communication: The tenant has been transparent about her situation, which can be a positive sign of reliability and sincerity.My Negative Concerns:Her Future Financial Stability: It's only a one-year lease, if her medical condition and financial condition should worsen (Heaven forbid), you may have to face her wanting out of the lease earlier than the 12 months and eventually you may be faced with having to decide not to renew the lease (after her 1 year contract is expired) based upon the sad news of her condition becoming worse, (Heaven forbid).  

@Clay TeegardenAmongst the avalanche of nearly identical responses from my fellow accountants about setting money aside and rates and so on, I will repeat a point that I consider crucial:There is no guarantee that you will have any taxable profit when you start flipping.

I have a reliable contractor who has done flips, I am also a licensed agent and know my market.

Start small - get yourself a househack, learn from your own experience of owning the rental property you live in, continue to educate yourself with reliable resources, and then worry about the next home.Having just one solid investment will put you ahead of most Americans than trying to find a way to buy 10 doors out of state in an area you don't even understand. 

Where can we find reliable source of REI Market trends?

- If I were to buy in Indiana, how should I go about finding a reliable property management agency?

That GC that won't rob you, be reliable, care about his/her work, work with you on draws. 

No right or wrong answer, but there is probably more risk buying a property and THEN trying to find/build a reliable team on the ground.Trying to find contrators, inspectors, agents, etc. you can really TRUST is difficult w/o a property though.Makes the most logical sense to find a GREAT PMC who can connect you with others as needed.