Salary Range to Migrate

Hi, I'm currently residing in the Philippines and I am earning at least $2k per month as a Project Manager. I'm still trying to upskill to get more big earning roles. My boyfriend is also working as a work from home ad specialist and his earning is around $1200- $1300.

If ever we settle down in the future and wanted to move out of our country given it's a lost case here with how the lifestyle is not that good yet all the goods are expensive, how much should we have as our monthly net worth together to be able to migrate to other country and what country is the best for starters like us?