They sent a very professional slide pitch deck that showed all of their justifications around that specific market, e.g. employment market, housing shortage data, the new developments in the area, the air bnb data, etc. etc.They also stated the numbers were conservative (7 year to reach the target returns) and that likely it will be year 4-5.

There also aren't too many properties out there that have a value add because buyers will pay top dollar for whatever comes on the market.

I want to understand how to structure the finance terms.if for example the house is on the market  for $200K1. how much do i ask for down payment2 going interest rate?

In regards to your markets you mentioned, TX is likely going to be a better market for appreciation than OH. 

People were talking about how real estate agents can't find off market deals@Bill Gulley said it.

the reality is BANKS left the fix and flip market after the GFC.. very few will do them unless your a premier client of theirs with a  long track record and they are doing them as a service to you. 

I have found very little deals thru an actual wholesalerRe read what @Thomas S. wrote If you don't take the time to educate yourself, create your own business plan,and know the metrics of buying selling rehabbing wholesaling,marketing ,etc you will just be throwing money away like the hundreds of newbies flocking into the business 

I like SFHs because in some of my markets they have a huge potential for upside and appreciation.

I'm now in the market for an income property or two!

There's a company called PadSplit in our market that helps with this too.