Other than delays causing me to miss flights and issues re booking wondering if I have considered the risks.

Intention is to fly TLV to BUD for business on a non BA carrier. Then fly BUD LHR YVR and return and then a non BA carrier to TLV. Why? Because the business class pricing is approximately 50% what I may pay if I flew TLV YVR and return (business side trip a convenient excuse to try this). Around $2000 Canadian after reducing price by some avios flown + cost of the side trip return versus 4300 Canadian after reducing price by same avios. Am I asking for trouble or adventure?