Utilize a 1031 Exchange: Under IRS Code Section 1031, you can defer capital gains taxes by reinvesting the proceeds from the sale into a similar “like-kind” property.

In fact, I would bet that 99.9% of all wholesalers could spend the some number of hours working at McDonalds and they would make more money.I recommend you focus on the house hack.

Could I 1031 exchange on the sale of the quick resale of the foreclosure to buy other investments or would I be excluded from the 1031 exchange as a "dealer"?

@Sequoiah BriseñoCalifornia multifamily sale and 1031 exchange purchases mandate landlords or property owners to issue 1099s for payments of $600 or more to a sole proprietor, LLC, or partnership, and request a W-9 from each vendor by January 31.Good Luck!

A 1033 exchange is specifically for involuntary conversions and catastrophic loss situations like yours. 

My easiest and safest bet would be to just build the outside storage lot.

The contract states “listing broker compensation shall be paid if property is sold, exchanged, conveyed within 30 days after the expiration of the listing agreement or termination of this agreement etc etc etc etc”- our listing agreement was set to expire on November 30, 2024 but we terminated it early- does this mean he will be owed commission if one of the buyers ends up buying my house on say January 1?

Quick cash on a flip is going to 1. give you more cash to play with vs HELOC interest rates 2. give you an opportunity to 1031 exchange into your next investment. 

FB Marketplace is probably your best bet - You can try craigslist too but at least with FB you can do a quick scan of someone's profile before talking to them. 

Purchase preforming notes capped at half your total deployable capital (150K)Then sale the future revenue of those notes through note exchanges, doing this will allow you to hedge the US real estate volatility while turning a profit from the market