How many children do you plan to have? Stim IVF maybe intimidating but one retrieval cycle might result in multiple embryos for a 27 year old. So it saves money if you plan to have multiple children.
Natural IVF is suited for poor responders to stim medicine, who might get < five eggs retrieved even on max stim, maybe only one or two embryos after one retrieval cycle.
In your case, you might not even need max stim to have > 10 eggs and multiple embryos.