I think you’ll be pretty safe. Golden Sunset was build in 2002. with most of the homes going for high $300,000 to low $400,000. These homes at 2800 sqft is slightly larger than Luminara in size, and those are going for low $600,000 right now. So your future landlord in theory has about $200,000 in appreciated equity.
the problem is you don’t know if he has been refinancing and HELOC’ing away. that you can only find out from a Realtor.
as for management companies, generally 8-10% of the rent is the market value.