@muaa
mhmmm The state of this thread!
Have had to re-read why OP is asking. She says she is willing to do it if it will make a significant difference.
I don't know your DH, but if you cannot expect to rely much on his support, go BC with the two kids. It will most definitely make a significant difference.
I fly first class and occasionally business class.
I have flown business class while on a business trip paid for by the client and therefore had zero sleep as I had urgent work to do all night on the plane as was due to make a presentation as soon as I landed. Had there been a family with crying kids- I would have just sucked it up- earphones, maybe ask to be moved if there was another quieter seat in BC. It just did not occur to me.
Another more interesting flight must have been business as I sat next to DH, two mid 40s couple struggled to settle the baby. My DH and I were more amused by the fussing over the baby by the two and the air hostess being asked to try all different baby seats on the plane. What was immediately clear to us, was that neither of the parent looked after the baby full-time so they had no idea what to do. After hours and hours of futile attempts, in came the nanny from her economy seat and within minutes, the baby was settled. We did feel sorry for the couple as we worked out they don't look after the baby usually and therefore had no clue how to settle it. Must have been 18 months or less. Did the crying make us upset or anything-not at all. We just sympathetically watched on from our adjacent seats. Yes, and we paid for those seats.
I always pay (not client) for 1st class even when flying without DH.
However, if I had 2 small children under 4/5 years, I have always pictured my sister and I flying with them and would probably fly economy with leg room- oh I recall that's an emergency seat so won't be allowed or (premium economy although never flow in before) simply because I see parents are just busy with the children until they hopefully sleep. So, I personally would feel it a waste of money to pay for BC/ 1st class and not get much sleep myself. Who knows, I might change my mind after one long haul flight in economy, as it is all speculation right now.
I know OP don't care (good on her), however as someone who flies BC both paid for by work or by myself, I really also don't feel anything when I see kids. So to those going on about money saved, honeymoons, business paying etc, it really doesn't matter. Anyone who complains about kids in BC/1st likely complains about everything in their life anyway. Yup, there are plenty of those.