I strongly suggest engaging the services of a consultant or advisor to assist you with this matter.

Everyone's situation is unique and I'd be more than happy to do a strategy session with you and your husband (free - I'll never ask you for money!) 

This weekend I was lucky enough to attend an MFIN - Multi Family Investor Network - conference here in Colorado and see BiggerPockets CEO @Scott Trench share the stage with @Ben Suttles and @Feras Moussa talking about the future of real estate investing, plus a number of other keynote presentations and informative breakout sessions.

He engaged in about 70 land development and business partnerships in which he was the operating partner.  

If by real estate business you’re implying you have little or no money to invest but are contemplating using one of the guru inspired methods (subject to, “wholesaling” , fix n flip) to create cash flow, I’d encourage you to do research on the true success/failure rate of people who engage in these endeavors, the amount of money the successful operators spend monthly on marketing, and the real time commitment and knowledge and experience necessary for success.  

They may even engage in intense, detailed negotiations.

I'll say, it's a good sign that the founder/owner is willing to engage questions.

If you engage in a real estate investment program as a means to build wealth, you are going to incur a significant amount of debt early on and likely for the next 30 years, as your holding grow.  

Active engagement in the Real Estate industry.Flipper    Builder  Lender  Syndicator  PM  Agent/Broker etc etc.Here you create your own income streams by working the business its a business its not just being a passive investor of cash flow assets..

They are an engaged couple, the guy’s mother, and the woman’s brother.