If you're not due until November you have more than 10 weeks to decide. Have a think about it by all means, but you can have an ELCS booked and then decide at 38 weeks that you actually want to try for a VBA2C, or vice versa. You don't have to decide before your next appointment and then no longer have any control over what happens.
I only have two children but the second was a VBAC. I felt really strongly that I wanted to experience vaginal birth, that my C-section had not been a good experience for me (other than my baby being born safe and well, of course) and I wanted things to be different second time round. I also had a small age gap between my children (21 months) and wanted to be able to pick up and cuddle my largely non verbal toddler who wouldn't have understood why I couldn't do those things when I got home from hospital.
In your case, your children are older and much more independent, they're out of the nappy stage and you don't need to physically pick them up. They will understand that they need to be gentle and help you out as much as possible if you're recovering from a C-section.
So really what it comes down to for you is how you feel about it. Do you want to have a go at delivering vaginally or not? If you have an ELCS will you regret not at least trying for a VBA2C? Or if you try and it doesn't work out and you end up having an EMCS, will that make you feel worse than if you had just gone for the ELCS? How do you think you would feel if you had a successful VBAC? It's all hypothetical but if you give it plenty of thought, I wouldn't be surprised if you end up with quite a clear idea about what you want as you get further along in your pregnancy.
It's true that there is a lack of data about the success rate for VBA2Cs due to the low numbers of women who have one. But that's not to say it is high risk; if they knew it to be high risk they would advise against it. I would imagine that they will monitor you pretty closely during labour if you do give it a try and it would be worth asking your consultant what the likely conditions would be if you do try for a vaginal delivery. For example, in my case my doctor said she wanted me to have an epidural in place in case they had to do an EMCS, and that if my labour stalled, they wouldn't wait too long before making the call for a C-section. She was willing to induce me if I went beyond 41 weeks, which not all doctors will do for a VBAC. In the end I had a more or less spontaneous (after a sweep) labour and was able to use the bathtub with intermittent monitoring during early labour. Then I got a fairly lightly dosed epidural when things really started to ramp up, had a nap on the bed for an hour, and my daughter was born an hour after that. It was a really positive experience.