My answer would certainly be highly dependent on his own emotional make up, his desire to relax and travel, his willingness to delegate and outsource, etc.

My firend once had a client who did a high end remodel in a somewhat modest neighborhood.

Real estate agents are not highly regulated in Costa Rica as opposed to North America.  

Would that be, for example, if the PM says, "I manage a duplex for John Smith in Turlock," then I call John as a reference, ask John a few questions, and then ask John the address of his duplex so I can later look it up on the county website and verify if he is the owner?

Quote from @Cathy Li: It's a white label software built on go high level.

All the best, Steven  If you're going to do a partnership or even a joint venture agreement I would highly suggest using a competent lawyer to draft your business agreement.

Quote from @Chris Lo: Which platforms/websites do landlords use to find the rent rate, how long the rental properties have been on the market, and all the details about other rental properties?

At the same time though, if you are the one who walked into the store and tried on the clothes and asked the sales clerk how it looks, then your asking to be influenced. if you spend time on a real estate investing website where people are in the business of investing in real estate and you ask if you should invest, you will likely get a lot of responses that say you should invest in real estate and let me help you for a fee.

Highly recommend (I require) collecting first month's rent prior to handing over keys.

I have an off market opportunity. 30 pad trailer park, only 19 trailers currently on-site 17 with MTM tenants. Rent roll was ~$8K last month. They are looking to get $500K for the park. 16 of the 19 trailers are park ...