I do not have a job or any income (although I have a job with my dad at his business guaranteed my senior year) but I still am committed to make rental property investing work for me and start before I am out of high school. 

Those laws actually seem to make it more likely that people with severe allergies might organize themselves or gather online to discuss how to find places to stay. 

I've been looking at and making offers on duplexes and some single-family homes for about 6 months now.

Making decisions as applications come in is a very good way to end up in court. 

Listening helps you understand what the other party wants, allowing you to craft creative solutions and close deals.Leveraging due diligence for negotiation and decision-making is a powerful strategy in real estate investment.

They basically state: "BUYER is responsible for making sure their broker gets paid X amount at closing.

Did we make the right choice not to give an extension? 

Would appreciate feedback/thoughts on next steps on Sell vs Rental approach.Looking at the very high monthly exp/rev ratio, it seems I should sell, but want to make sure I'm exploring all options.

Seems like you have many options and making moves to get you closer to your goal is where you put your time and resources.  

If the renovation cost makes the total purchase creep up very close to the new build, I think it's a no brainer.