This will help you figure out the unknowns you mentioned here:"I think any of the 3 options would qualify my wife to contribute to our Solo 401K?

you don't owe a mortgage, so there is no time clock ticking away for paying this back (plus interest). you also mentioned you have a full time job that sounds like it pays well. why not take a break, save the money you need, or pay as you go per project using your paycheck. if you haven't had to borrow money at all for this project, why start now?

As I mentioned it is also on the MLS.

But type the @ directly follow by a few letters and then wait 2 seconds and a list will pop up for you to select the name.2.

I am in the sitting and waiting stage in my investing. 

I was going to pay the full asking price because 1) the numbers still worked and 2) like you mentioned, very little inventory to shop around  

Wait, you have no proof of earned income yet, how can you have a SOLO-K...chicken vs the egg syndrome?

As Robert mentioned, there is a meeting hosted by @Phillip Dwyer in Henderson near the end of each Month.

I'm a real estate agent in Birmingham, AL. Does anyone have any advice for someone new joining this site? 

You did not mention the current value of the properties.