Most prefer havng the entire space to themselves and they don't want to pay a lot.

I was coming from the notes space where almost all transactions begin with an Option.

It explains why very few flippers are adding single ADUs and if they are they are usually a conversion of exhisting habitual space (bunk houses, detached offices, workshops, craft rooms, etc.  

Find a brokerage that specializes in the investment space.

Also, you may want to look into a two family home and rent out part of the space of your new home under the FHA loan structure too. 

But most importantly, they do not need to be paid back.Funding Sources:Local Government/MunicipalitiesState GovernmentPrivate FoundationsFederal GovernmentFamily OfficesCorporationsWhen applying for a grant, ensure you have an understanding of the details such as eligibility, your project readiness, the purpose, funding amount, areas of funding, limitations and deadlines for the application.The prime candidates for a grant are 1) those developing a real estate project or physical space, 2) scaled non-profits and 3) certified non-minority owned businesses.Ensure you are able to provide the following documents before applying for the grant:Show site control through documentationA project description or business planConceptual drawings or renderings of the physical spaceProfessionally prepared budgets for the company and projectWhat does the grant application process look like?

While rates were near all time lows, we bought a home that we could reside in and rent out the backyard detached living garage space.

@Matt Huber I think you know your answer already Direct real estate ownership should compensate you appropriately why else be in the alternative space.  

AntiochWhy It's Hot: Historically considered a more affordable suburb, Antioch is evolving as more people move to Nashville and look for space and affordability.Key ROI Factors:High rental demand makes it ideal for flippers who want the option to hold properties.Rapid development of retail and infrastructure is boosting home values.Pro Tip: Invest in homes near the new developments around Century Farms or along Murfreesboro Pike for maximum appreciation potential.Bonus Tips for SuccessRun the Numbers: Stick to your investment formula, but be flexible.

For further reassurance, you could take their lease to a real estate lawyer and ask them to review it.Lastly, If you have any friends in the property management space, maybe you could buy their leases as well.