We look primarily at the property and the numbers to determine if it is a good deal.  90% of underwriting is based on the property not the borrower.  

Zillow gave me a rental estimate which is based on 2-beds and rentometer did not include data for 1-beds since it was searching within 1-mile radius.Is it a good thing or a bad thing if there are no 1-bed 1-bath in the vicinity?

It's great that you found a seller willing to accept seller financing now just cover your bases.

@David Nacco I bought my first investment property from Candace Saunders at Saunders Real Estate Pros, and she's based out of Franklin.

I ended up in a debt hole since the program cost me about $8000, then they introduce you to Prime corporate service to do your taxes for another 2k and then set up your business and registered agent stuff for another 2k.

Focusing only on traveling nurses is limiting the client base.

Based on what you have said above, I would recommend the Multifamily Bootcamp. 

Being it's your first deal, it's going to be harder getting debt options and you don't want to be over leveraged anyways so $900k should equate to a max $2m deal.

To experienced investors, I'm a RN based in Fishers, spent the last two years traveling.  

It really depends on what you prefer, some prefer crypto currency (not me), I prefer private lending / mortgage notes and structured it in a way where there is no ordinary income taxation on it, so it is treated as a qualified dividends.You can invest in anything / any type of business, it really is based on what YOU want to invest in.