This is what I plan to use Bitkey for, but I think you could use Nunchuk similarly. I will fund the Bitkey throughout the year above and beyond my standard DCA and I set the No Device daily spending limit to the upper bounds of what I think I may need while traveling. If I get pickpocketed for instance but still have my phone, I should be able to find a way to get from Bitcoin to local currency.

What are the laws around foreign legal tender and small spends? Is Bitcoin still legal tender in El Salvador?

You can never go home again.

I use Aqua and Liquid with my kid as well. Liquid for fees and mostly just to play with it. It provides the kid the same basic workflow as onchain so she is learning that process more or less.

Tax season and year end book keeping.

I would like to use Robosats, but if I am paying with a kyc fiat account whats the point?

River is great... I also moved my fiat savings account over to grab the 3.8% paid in Bitcoin.