I am starting out in the rental real estate investment space and considering Section 8 rentals - not necessarily limited to any specific city (would appreciate suggestions).

I'm open to any suggestions.

If you're interested in a market with strong long-term growth potential I'd suggest looking into Columbus! 

We have history with her payments but I will be ready to respond as needed EVERY TIME, as you suggest. 

I would hugely appreciate any suggestions, tips or tricks!

Tulum has beautiful beaches, trendy restaurants and shops, and eco-friendly resorts that make it very popular.I'm wondering if anyone has insights into whether something like this could realistically be developed in Colombia?

I would suggest that you talk to a professional so 1) your financial information is accurate  and lead to good decisions 2) you don't miss out on any tax saving opportunity

You want to rent out your house but wonder if you should use a property manager or self manage.I always advise my clients to use a property manager to make owning investment real estate as "passive" as possible and if the property manager is good they will help you maximize rents with their management and reduce turnover and the cost of tenant turnover.

I would suggest connecting with a diverse lender for investment property mortgages.

If so, what would you suggest as the %?