NOBODY on the planet can absolutely ‘guarantee’ when a funding will occur.
There are a million variables.

(It’s like asking when your car is going to run out of gas. Even if you fill your tank today, the answer will be different for everybody)

There might be someone who will offer some compensation if it goes beyond a certain date, but it’s just impossible to predict how long it will take.

I recently had a ‘flood zone’ requirement for a property that never needed flood insurance before.
Turns out that FEMA changed flood zone map in 2012. Lender didn’t request it until 3 weeks after submission. Borrower had to get flood ins or there was no loan, this delayed getting docs by a few days.
SO many things can pop up. Labor day weekend is a loss of 3 calendar days at this time.

However,
Loan docs can be signed almost anywhere, domestic or foreign. I have had notaries meet with people while on business trips or vacations out of state, and in a foreign country they can usually be signed at an embassy.

If you wish to discuss, feel free to contact me, and I will try to help,otherwise best of luck and have a safe trip!