In my slight defense, it’s my first time, I was super nervous, and felt so absolutely intimidated (the fact that this guy and I didn’t even click whatsoever was a red flag).

Yes, it may last 50 years, but will even still own the property then (you likely dont need that level of workmanship).An option could be to do the work in sections.  

Unscrupulous tenants have been known to turn on appliances and leave them running, turn on faucets and leave them running, turn on lights and leave them running, turn up the heat and leave it running, remove smoke detectors, unleash pests (insects/rodents/etc) in the property, and worse.Fifth, see if your situation meets the criteria for abandonment, for your jurisdiction.

And yes, I feel fine about the rehab/flip.....it's turning around and selling it as is for profit without putting any money into it that makes me feel nervous.  

If you know all of that information and you are just nervous about the conversation or making an offer... this is where the rubber meets the road.... pick up the phone and tell the real estate agent that you would like to make an offer on the house.

I feel a little better now, but still nervous lol.

I have the opportunity to cash out refi around $30K on my HI house, but am a little nervous because it's the house I live in.  

exciting and nervous all at the same time.  

This would possibly be my first real estate investment, and I'm just nervous something terrible will happen and I'll realize why the price dropped so much without anyone biting.

Modular" can also mean a home stick-built in a factory in sections ("modules").