I recently got to know another local flipper and he informed me of a private lender he works with that covers 100% of the acquistion cost and charges 1.5 points and 13.5% (no rehab cost covered).

You pay taxes on any profit-ie the cost you sold it for minus the cost you bought it for. 

Trying to determine if a cost seg study is worthwhile.

Check with your plan administrator for the details of your specific situation.The IRS rules allow for a certain amount of flexibility in this area, and most plans do not have pre-payment penalties.Keep in mind, however, that you put the money into the 401k pre-tax.

Trying to estimate total cost to install new vinyl plank flooring throughout.

So when I search for a place based on price, you come in ahead of her on the search, even though you might cost more.

Pete FL for around $75k, you just have to come up with the best floorplan and use that will justify the land cost.

Subject to seems to be more ideal to avoid any confusion over ownership, but it sounds like a pretty involved process that could cost time and money (whereas the other approach is free and simple).Any insights/advice would be appreciated!

What are the new costs, terms, conditions, years?

Look for places that are investor friendly, have expanding growth and still have a relatively low housing cost such as Florida.