The data is readily available, and I will provide the data source and its relevance.To ensure we're on the same page, the goal of real estate investing is financial freedom.

Minoan.com is a great option to use for a situation like this!

If after all expenses it cashflows then yea that would be the best option for you'll be able to sell the land, if it doesn't then hookups might be a better option (With the big assumption that there is demand for that in that area) 

A duplex, triplex, or fourplex is ideal because the more units, the more financing options banks may offer.

If you can walk into the deal with some nice equity then it gives you more options in case you want to get out of the area. 

The other question I have is can I charge her interest as another option?

This is the best option if you have a lot of money but limited time.

Liquidity: If this is your first or second property, prioritizing liquidity (by cashing out now) might allow you to seize unexpected opportunities, especially if you’re actively prospecting deals.Since you don’t have a deal lined up yet, you might explore options to minimize the gap, like prequalifying potential deals or using short-term financing strategies to bridge the 4 months.Good luck growing your portfolio!

I am considering other options to see if there are ways I can hire someone to just do showing only and mamage my own rent collection through Zillow app, I also have my own contactors to do maintenance but have been paying monthly fee to my property manager who has done literally nothing, they also never answered my calls.It definitely sounds like you need to reevaluate your relationship with your property manager.

Another good source of information and points opportunities is frequentmiler.com.