At this point since it's after the fact while not totally correct; you may explore adding the missed asset/basis amount as a selling cost to just reduce your gain. 

We currently stay in Miami and prices here are very expensive i do want to stay in my backyard but prices are extreme  so i would love to explore some out of state markets ! 

You could also explore a jv partnership with a local investor.

If house hacking has been successfully executed, have you considered exploring a new house hack opportunity and converting your primary residence into a rental? 

If you’re not satisfied with your current attorney’s approach, it may be worth seeking a second opinion to explore other strategies or angles you might not have considered.Next, focus on compliance with housing codes and tenant protection agencies like DCF.

To minimize capital gains tax on the sale of their primary residence, your in-laws can utilize the $500,000 capital gains exclusion, potentially explore an installment sale to spread tax liability over several years, or consider converting the property into a rental to use a 1031 exchange for tax deferral eventually.

Explore my personal favorites, Set For Life by Scott Trench or The Total Money Makeover by Dave Ramsey, for invaluable financial insights.3.

Over time, I’ve built a network of 20-30 clients who are always eager to explore new opportunities, and right now, real estate is at the top of our list.I’m diving deep into how to best use $150K-$200k in 0% interest business funding for real estate investments.

Quote from @Michael Smythe: @Kwanza P.Recommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

Explore my personal favorites, Set For Life by Scott Trench or The Total Money Makeover by Dave Ramsey, for invaluable financial insights.3.