I am planning to make the purchase with a Black Friday sale!

It's really impossible to give you a direct answer on your question without knowing a lot more about your plans. 

Denver is a strong market with solid appreciation and plenty of opportunities, especially for strategies like house hacking and the BRRRR method.Your plan to start with FHA and house hacking is a great way to get your feet wet.

I’ve heard some investors negotiate with their providers for extended coverage or switch to a landlord or vacant property insurance plan until the spec sells. 

KeyGlee was planning to double close here.

Or do you plan on giving them the $1,500?  

As others have stated, your fit & finish goals should be guided by whether you plan to:1) Rent: tenants don't always take care of a property, so you want to use lower-grade materials and workmanship.2) Flip: higher quality on workmanship and materials is usually required.Regardless, you always want to "Maintain to the Neighborhood".

Any suggestions I appreciate in advance.Worst case, I'll just create something for him and walk him through things as he goes, but I'm thinking, why not document it for us both (no plans to publish or anything though)!

The way I'm looking at it, if my spouse and I only do employer matching for the 10 years we would have more than enough in there and still 10 years out from being able to access it.I do plan on doing 401k loans for deals if the numbers check out, and I've considered rolling over some of our 401ks into roth IRAs to access our contributions but we'd have to pay taxes out of pocket (a big hit to cash flow) and we couldn't touch it for 5 years.  

I am considering moving back as I have family there and if so would plan to look for fix-n-flips to invest in.