For what you've (and will be) investing in obtaining and maintaining your license @Tyler Stone, you'd been better off using an already established Realtor since, as a Buyer, you don't pay commission- maybe you can share more as to what went into your decision to get licensed? 

I just completed my Delaware pre-licensing sales course to obtain my realtor's license as well, because I've always believed being licensed is a great advantage as an investor.

When the public speaks, don’t argue with them.

Hoping to obtain a property a year to set myself & family up for the long term.  

I think 20% is easily obtained with a decent credit score. 15% will be a little more difficult.

On septic and public water.

Their MLS system will have ways to search that you can’t do on the public access sites. 

How difficult is it to obtain a second mortgage about 6 months after purchasing my first rental property?

I obtained my real estate license in early 2021 in Minnesota.

Public want to make an offer on a house that is not listed, and I can call or otherwise reach out to the owner of the house I want to buy and make my offer known.