If she's staying another 2 weeks, charge her what the rent would have been for Jan. 

You can grow that account to what ever you are comfortable with.  

If I am all in on the property for 360k (purchase and some finishing construction as well as carry costs) and the home is valued at 450k or more (based on what im told by agents as well as my own analysis while staying conservative), that is 20%+ equity I believe, unless I am missing something.

I'm not comfortable with them, especially for the first 4 items.Would you kindly explain to me for each of them?

1.Finding Value: Identifying properties with strong upside potential is critical in markets like Antioch.2.Rehab Management: Staying under budget and on schedule ensures better cash flow and quicker refinancing.3.Leverage Matters: The HELOC strategy allows me to scale quickly and acquire more properties without tying up personal capital.

I'd love to stay in touch and keep track of how you're doing as well!

First time in 3 years we have had to file a claim with over 150 airbnb stays.

If you're looking for appreciation you should stay in Vegas.

If you do not feel comfortable pursuing additional growth, I'd wait it out just a bit. 

Using Tools Like BiggerPockets:BiggerPockets has great "premium" calculators, but if you're comfortable with spreadsheets, you can create your own analysis template.