I’d say you’re easily looking at multiple surgeries. In your shoes, I’d probably do midscalp and frontal, and leave the crown for a later date. Heaven forbid you have subpar growth on first surgery, you don’t want to waste precious grafts on crown before you have the front sorted. Crown can always be filled in with other methods like Body hair.
You could also have it all done at once (probably 2+ days), but personally, I’d do it in steps.
Id probably consider Eugenix because of their great work with high Norwood cases. Have you looked at Pittella from Brazil? He was just on a livestream with Melvin and he has some nice results. He might possibly be in your budget range