Not looking for a direct referral or recommendation but open a line of communication so I can express my interest and how I could contribute to their company. 

Kitchens, bathrooms, plumbing and electrical is already set up and you just have to have the tradesman do the hookups, theoretically. to be honest my advice is to sell the lots you own and buy new. most lenders won't consider your basis in the land as equity, there Needs to be a new transaction created. at least from all the lenders I've seen. we talk to land owners every day in columbus that own land but it's unentitled and doesn't have any transaction recorded so the equity contribution that you are given credit for is vague. so if you sell your lots and 1031 into another one, in my opinion it's the best of both worlds. if you can'ts sell them, entitle them to get higher values and then 1031. talk to a zoning attorney. 

Or can I have both, but cannot contribute into both in the same year?

If your family is contributing, you could purchase a multifamily home to house everyone, while renting out units you don't need.

This preference for city living has fueled demand for urban condos, lofts, and apartments, driving revitalization efforts in downtown areas and contributing to the development of mixed-use communities that combine residential, retail, and commercial spaces.Emphasis on Sustainability and Energy Efficiency: Millennials are more environmentally conscious than previous generations, placing a high value on sustainability, energy efficiency, and eco-friendly features when choosing a home.

Looking forward to your insights and contributions!

I don't expect anyone to live somewhere "forever" but when they stay multiple years and leave the place decent, that's contributing to lower costs even with a vacancy.Just had someone leave due to financial issues but they left the place in good condition and I was able to start showing it immediately.

Example setup:Person A is time & energy partner - no capital contributed, will be finding the deal and managing the property.

Thank you both for contributing.  

I've had inspectors contribute to killing a deal as well.