Electrical Needs

Hello Good Old RV Group,

I have a 72 Jayco Jaywren. It has been gutted and I have to replace some rotted framing but I need some help with the electrical needs. My plan is to install an on demand hot water unit, a mini-split heat/AC unit, outlets and LED lights as well as a fridge and microwave/convention oven. I need a suggestion on the size of the breaker box and placement. I am planning on a small bathroom with/a shower. Finally, all the wires were bad for all of the exterior lighting so that needs to be replaced too. Can anybody help?

Thank you,

Sincerely,.

John Potter