The screening process plays a big role in the odds of collection.

Perhaps if your partner was a general contractor or handyman type there may be some merit there to reduce costs / increase profitability.If your partner enjoys deal sourcing, a better move might be for him to become an agent - so he could legally collect commissions from finding deals and managing properties for multiple people. 

But I wanted to collect some recommendations in the meantime. 

If it would concentrate on rent collection only and do it well, it might be okay.

Advantages are we don’t have to furnish anything in the house and we collect the same amount of rent each month no matter how many members are in a house.

Nice try, but this time does not count.In order to meet 750 hours, your wife will need one of the below:- do something else real estate related, like wholesaling or realtor- actively work on expanding your rental portfolio - have an extensive DIY rehab, like a month-long full-time rehab (and then she might need another kind of rehab)- a calamity such as multiple properties damaged in a storm where she will have to deal with insurers and contractors- something else out of the ordinaryAgain - if all you have is 9 single-family properties with stable tenants and typical occasional maintenance - you don't have enough work to collect 750 hours.

Currently, we are targeting multifamily properties of 100+ units, and have been actively engaging with various owners and brokers, submitting Letters of Intent (LOIs) and working to secure deals.While some may consider our approach bold for new investors, we are confident that, with the right team and expertise, we can succeed in achieving our objectives.I’m excited to be part of this community and look forward to learning from your collective experience.

Based on a quick answer from Perplexity it seems like there would be no issue with you buying the home and collecting passive income, but you may not be allowed to manage it yourself since that is considered active work.

Quote from @Joshua Kaufman: I'm having an issue with rent collection from a commercial tenant.

@Michael Darten  Most property management agreements have the monthly PM fees based upon a percentage of rents collected.