I manage tons of homes for investors and owners, and I have this conversation all the time.

If most rental demand is for larger homes, it may take longer to lease.2.

I took on an occupied property where the tenants had been there for over 10 years, and no inspection had ever been done.

For example Intel headquarters, Google, FB, Amazon, Nationwide, Honda, (recently Anduril announced another 4k jobs to Columbus).

I highly recommend investing in a property management software, such as Hospitable, for syncing your calendar, automating messaging, and scheduling cleans, as well as a dynamic pricing tool, such as PriceLabs, for optimizing your pricing based on market demand, local events, and seasonality. 

For FHA, the underwriting guide says 75% of the lesser of A.) the leases/rental agreement or B.) the appraisal comp rent schedule.

Bigger Pockets is a great place for education and networking. 

When you say 'legal one family', do you mean that it is zoned for single family residential?

Between strict public record laws, limited access to data, and the way certain counties handle records, finding motivated sellers can feel like searching for a needle in a haystack. 

@Matthew Becker Thanks for the advice and yeah I intend to get them out into the units more as they get older.