Best thing you and your husband can do is to continue to increase your cash position, which will gradually open you to more and more potential investment opportunities, markets, and strategies.

Do you have recommendations for low cost options to post a 10 day notice on the property? 

Setting aside the potential for improved ROI for a moment, here's how the (over-simplified) numbers look to me personally.If I were to buy 50% outright, that would be 22k net income / 340k purchase = 6.5% CoC ROI.

I don't think it costs anything to list on zillow. 

It's a great idea to do in college with limited cost and downside.

In my case I live in the DC metro area and the cost of rent anywhere I would want to live would be 1500-2000 a month (obviously split with a roommate) I would rather continue to grow my business and hopefully save up enough for a down payment then move out and spend a ton of money just because it’s quote on quote time

In high cost areas, it may be virtually impossible to cashflow/hit the 1% rule today.

The selling partner gets 10% more in reduced selling costs and the buying partner saves selling costs on their portion. 

Do you need a course costing $1,000's which could be put into another property? 

I just read an interesting article on Business Insider about the potential resurgence of home flipping and the BRRRR method.