My brother currently lives in Dallas and pays an arm and a leg to rent an apartment (He is married so cant house hack).

I am getting married next October and want to be able to hang out with my future children but it is a little hard to visualize that since I don't have kids and am not married yet.What book would you recommend to read next to really pound my why into my head?

Convert the Property to a Primary Residence: If you live in the property for at least two of the five years before selling, you may qualify for the primary residence exclusion, which allows you to exclude up to $250,000 of capital gains ($500,000 for married couples) from taxation.4.

Meeting that 2 in 5 of the last requirement allows a single owner to shield $250k of appreciation and a married couple to shield $500k.Unless you predict a lot of income from the MTR or you feel that there is a lot of appreciation incoming over the next three years (minus time get the property sold), you may want to consider collecting your $100k (passing GO) and redeploying that money to whatever you feel is its best use. 

Other items such as having accounts in a foreign country.If you are single/married, with a few W-2's, interest/dividend accounts with one rental property.

This type of company will be married with you through the longevity of the investment so naturally their interests will have to be mutually aligned. 

Here's the drama part, while married her husband somehow went behind her back and pulled out a large HELOC.

She'd probably have to get a new loan in that scenario however obviously in order to get you off the current loan unless the loan is assumable, but that's the downside of linking your finances on a 30 year contract without being married. 

If you have lived in the property for two out of the previous five years you could qualify for the 121 exclusion, where you get the first $250k ($500k if married) of the gain tax free.

Note that if you are married filing joint, only the spouse who is qualifying for REPS is able to count their hours.Step 4: Apply the quantitative testsPer Section 469(c)(7)(B), in order to qualify for REPS, you must meet both of the tests below:750-Hour Test: If you materially participate in a real property trade or business, you must spend 750+ hours during the tax year.More Than Half Test: You must spend more than half of your personal service hours in the real property trade or business in which you materially participate.Step 5: Material participation in rental activities Just because you qualify for real estate professional status does not mean that your rental activities are automatically considered non-passive.