Some of my friends outsource the cold calling and inbound calls from the direct mail campaigns and only call back interested sellers.

In 2021, the inbound number was 210. 

There's huge seasonality with the wintertime tourism.

@Tiago SpeckeInvesting out of the country can work very well provided that you have the right knowledge and connections or you have access to people who have those.I like to invest in places where properties are inexpensive, there is a large amount of tourism, there is a path of progress and the legal system doesn't discriminate against foreigners.

I'm curious to see what the tourism does in the coming years.

Yes, Mammoth Lakes is a community whose primary source of income is tourism in the winter (ski resort) and summer (near Yosemite).

@Rossitza IovtchevaThere are many other reasons to invest in Mexico and, in my humble opinion, it's the best time ever to do it for a slew of reasons on top of those you mentioned, the main ones being a rising middle class, a booming tourism industry, a growing number of visitors beyond tourism (remote workers, expats and retirees), the best possible regulatory climate for short-term rentals, much lower prices and costs, diversification and asset protection.

@Will Schafer if you're already doing outbound marketing (Direct mail & cold calling) you might want to balance your marketing with some inbound leads (facebook ads, adwords etc).

Specifically, I'm looking for a (mass) tourism market, an emerging middle class and/or an economic and political climate that isn't unfavorable.

Off the top of my head Costa Rica, Honduras, Belize would be interesting options since CR and Belize are fairly well established in terms of tourism.