@Marc Maser Congrats on getting you first flip. Is this your first deal? My first flip was recently completed and in contract. Below is a list of "Quick tips" (plug Biggerpockets Podcast) since you are just getting started on your flip. These are some things I have learned since my first flip that I wished I would have known about earlier. PM if you want more details.
1. Get a home inspection before buying. Ask your realtor for the most picky home inspector's contact info and use them. This does not really apply to your property since you got this at auction but for others reading this it is a great learning opportunity. I am not really sure how much wiggle room you have in your budget but it might be worth spending $400ish to get an home inspection before doing any work. Walking properties with a home inspector has be by far the most valuable thing for me and I wish I would have done it before starting my flip.
2. Take a specific set of "before construction" pictures and when completed take those same photos from the same angle. Example This will be good for keeping track of your deals as you grow, showing off to friends, and is good to have to show to banks and future investors. People are more willing to loan you money and take you seriously in the future if they can "see" your experience.
3. Create a very very very specific scope of work (SOW). This document (simple excel) is a lifesaver (and money saver) when it comes to bidding out your work. The SOW I used for my first flip is here. It is basic but every single contractor that came to bid was very impressed and loved it. It really helps get bids apples to apples. After choosing a contractor I just added this 6-7 page document to our contract.
4. Once under construction, visit your property 2-4 times weekly. I personally did my flip while working 48 hrs a week and I made sure to stop by the house often on the way home from work to make sure the contractor was doing what he was telling me he was doing on the phone.
5. Look for opportunities to increase "livable" (heated and cooled) square footage. During my flip my realtor suggested we add a "hotel" style AC/heating unit in the breezeway between the house and the garage to bump the sqft from 1755 to 1935. We listed the house at $92/ft. That suggestion to bump the sqft increased the asking price from $161K to $178K. It cost me $1400 for labor and material. It was a pretty good ROI?
6. Get a pre-home inspection. Schedule a home inspection (from the very picky person) after construction is done and before you put it on the market. This will look good to any buyers, in the disclosures, and your realtor should be able use this as a selling point to buyers.
7. Walk the property with the pre-inspector. I just started implementing this into my policy on flipping and I have learned a lot on what to look for and what current buyers are looking for regarding what should be fixed.
8. Finally, use BiggerPockets during the flip. If anything comes up that you are not sure of, don't automatically believe your contractor (if your relationship is not built yet) and ask the BiggerPockets people for advice.
Well this went much longer than expected. Feel free to ask me any questions you have. I am more than willing to help.