“Broke,” when it comes to nations, is a relative term. The money would come from the reestablishment of relations with the US, including aid, or, in the alternative from Vlad the Colluder, if Trump isn’t interested. I wouldn’t call it bribery. Give them something constructive to do besides gun and drug running, and pay them for it. Bedouins are flexible.
I don’t share your dim view of Egyptian troops’ capability. They hate the Jihadis for what they did to Egypt and for attacking them. It’s personal. Maybe Israel won’t get to operate openly in the Sinai, but covertly they can provide equipment, training and intelligence.
Palestinian access to Egypt? Well, yeah, that is a problem. It’s why this would be a Palestinian State in the Sinai adjacent to Ghaza. They’ll need passports and visas to enter Egypt. If Hamas messes with Egypt, it would be an act of war, which would give license to Egyptian troops to enter and apprehend Hamas leaders, and set up a puppet government, something that Israel could not do.
Working with the MB? The puppet government replacing Hamas after they try that would be happy to snitch and get in the good graces of its master, Egypt. Egypt, for that matter, will be holding elections soon. No MB candidates need apply.
Theyll need passports and visas to enter Egypt.
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or tunnels ...