I agree and as you said "if you want to make money" but in this case I am not trying to make money, right away but rather not loose money if anything.

Agreed with Bruce.

I agree with @Michael Baum do guests mention in reviews?

I do these loans all over the country and have never had those as conditions.  

For a 4 bed you are likely looking for insurance placements I agree .I  would love to know if someone has experience working with  insurance company  that are looking for a placement.

I’ve had several investor clients go with a new (to me)/ unproven lender because of a slightly lower rate promise only to get burned by that lender (closing costs were higher, appraisal costs much higher and appraisal was a nightmare, main point of contact gave us the clear to close as we passed our financing contingency then just before closing someone from the underwriting department we previously didn’t know existed said we need a few more days and seller didn’t agree because they had a higher backup offer, jeopardizing the earnest money and losing the property, etc).

Agree 100%.

Tell her if she doesn't agree to the new rate, she give notice to vacate and provide move out instructions. 

From talking to locals, there's a couple of issues than need to be addressed, some are the non-ecological practices that some of those developers have, unfortunately, our government profits from this investors and allows them to destroy manglers (which are the natural water purifying system of that area) dismantling hectares of mangroves and degraded the habitat of resident and migratory species burying animals alive.There's proof of fecal material floating beneath the city of Tulum, only 20% of the water is sent to the water treatment plant, there's no infrastructure for the exponential growth.The landfills in the middle of the jungle that is leaking hazardous pollutants into the freshwater system and that something that developers won't tell you.I love my country and it would be a disaster for everybody if this place ends up like some other great beaches around the world, that are completely ruined by greedy investors not following the rules.There's no urban or comprehensive master plan, and one of the risks is that Tulum will be like Playa del Carmen is today, overgrown and with environmental devastation.I will advise doing a lot of research before getting something in Tulum, different country, different rules, and practices.

@Silas Melson, I agree with @Bruce Woodruff that a price per square foot approach is likely to be the least accurate and least useful.