The costs ROUGHLY range from $105-$120/ft for new construction single family on the low end (if you're careful on costs/finishes, otherwise you can easily run way over that with more expensive flooring, appliances, etc.) and multis can run $120/ft and go way, way up from there. 

Since this is my first rental, I'm not sure I can offer much in the way of rent specials.

I am citron you can do it to.  

In return I can offer access to MLS information(Realtor), Sweat equity(maybe you need help in one of your flips), Bird dogging, or even listing any properties for you in return for your guidance. looking forward to connect with the community.

I tried to estimate what a GC might cost in my calculations, but I have an uncle who does roofing and cousins with window installation and landscaping businesses, so I believe I can save some significant costs through their help and guidance. 

I'm looking for a  sincere mentor to can help me and guide me to avoid all the avoidable mistakes I might go through.  

Elizabeth,Please DM me to see how I can assist. 

I am looking at single family homes that I can get for around 80K, rehab and then rent out.

You can get significant savings for legal and compliance costs in addition to providing one PPM and one K-1 to your investors regardless of how many deals they invest in. 

Unless you or your wife can qualify as real estate professional status and claim passive non-cash losses against your active income.