I have a 50amp GFCI line going from my panel to a jacuzzi. I want to move the jacuzzi across the yard and place a built-in BBQ with outlets/light where the jacuzzi is currently.

Here's what I'm looking to do. Please let me know
If I'm doing this correctly.

1. Swap the 50amp breaker in the main panel with a 60-70amp breaker

2. Install a subpanel at the BBQ

3. Put the 50amp GFCI and 15amp GFCI in the subpanel

4. Run the lines to the outlets(BBQ) and jacuzzi.

Also, I'm looking to run the new line to the jacuzzi underground (220v/50amp)
1. what size wire
2. what type of wire? (Outdoor Romex in conduit is a no no I heard?)
3. what size/type of conduit should I use?

Thanks so much!