Any recommendations for a free or inexpensive app for tracking expenses and mileage?

If you need financial help, ask under the "Finance, Tax, and Legal" forum.

Therefore, what would be the capital gains tax implication on this? 

Some are debt free or close to it.  

"Labeling" is not relevant for taxes. 

We are going to be buying property and building a spec home shortly and need to understand the pros and cons of doing this deal through an LLC vs. as individuals, from a tax perspective.

UtahAmericafirst 80% LTV on noo 65% LTV UtahArvest Bank AR, OK, AL, MO Bancorp South, TX Lines of Credit on free and clear housesBankNewportBank of Southern California, CABank of West (BNP Paribas) 60% LTV CA, AZ, ORBankRIBB&T will loan on a rental portfolioBBVA, now PNCBECU for ORBellwether Community Credit Union, NH and MA 85% to 100%, draw 10 yrsBMO Harris, 3 HELOCs to 70% LTVBoeing Employee Credit Union Cal Coast Credit Union, CA Change WholesaleChelsea Groton Bank, CTCitizens Bank -MNCitizens, first position HELOC CMG Financial 70% LTV CMG Financial in Idaho will do 100% on owner occupied.Coastal1, RICoastal Federal Bank of NCConsolidated CCU, high LTV NOO LOC, OR, WAEast West Bank, up to 60% LTV with "no docs” CA, WA, NV, GA, NY, TX and MA.

If you need a commercial attorney recommendation, please feel free to reach out.

I realize this post is 2 years old but someone may have the same question.I use Microsoft One Note for Desktops, it's free and stores your notes in notebooks with tags that are easily searchable for reference later.I have notebooks for Note Investing, Real Estate Investing, Information Technology, and Digital Marketing.Usually, something that I'm studying falls into one of those categories and each notebook has subcategories. 

For the STR tax loophole I would speak with your accountant on the specifics.