I'm shocked at all the 'run' messages on here.
Once you get to a certain age, it's highly likely new partners have children, you can't rule people out of potential dating just because they are a parent. Well, you can, but you may well miss out on great people.
I married DH when I was 31, he was 40 and his DC were then 10&12. We had a DC of our own who is now 16.
Yes, he was less wealthy in the early years as he was paying for the DC, rightly so. That stopped (largely) at 18 though.
Yes, he spent time with his DC, away from us, rightly so. Was not a major problem.
Yes, there were sometimes issues with exW. Again, they fizzled out. We're pretty friendly now.
The teen years were tough at times, when they were going through difficult periods.
However, I now have two lovely grown up DSC who enhance my life. I even have a GC who I truly adore and wouldn't be without. My DS has older siblings he wouldn't otherwise have had. They're not my kids, no, but I am very, very glad they are in my life.