It's very sad that you didn't realise but it reflects entirely why (in my opinion) you were too young to have a child in the first place.
That said, please don't think the foreign holidays and designer clothes are the important bits (or, indeed, what I would be concerned a child of a teen Mum would miss out on). Nor is the size of your house relevant in any way. People who attribute anything to someone based on the size of their house is a dick (and probably insecure, at that). As I said, earlier, I personally would take notice of tidiness, cleanliness, is the TV on constantly etc. But that's just me. I'm not everyone's cup of tea (and I am perfectly content with that).
I digress...
Love is, of course, the most important factor. After that, I would say it is investing time and energy into your child. Read to them frequently, share with them your wisdom, open their eyes to the breadth of the world and opportunities out there, teach them to be good people who try to give more than they take etc.
The difficulty is that awareness of, or ability to offer, some of those things come with age or life experience or decent finances. For example, money helps because it can buy experiences which broaden one's horizons (sports clubs, music lessons, theatre trips, travel etc). Similarly, understanding what it takes to be self-sufficient is often lost on teenagers.
Now, my Mum grew up in a Council house with very loving, proud parents. My grandad was ill from very early on but they refused to claim any benefits and so they struggled by. It meant they couldn't afford to send my Mum to any of the private sports clubs her friends went to, and she missed out. She made it her mission to ensure that my sibling and I could do those things. But, while she didn't have those opportunities, her parents invested a lot of time reading and educating her (my grandad being an exceptionally intelligent man). They didn't have money but they were able to offer lots of the other things between them, including demonstrating what a healthy, romantic relationship looks like.
Again, I think a teen Mum, who I would expect to be single, wouldn't only be lacking in funds but also many of the other virtues that an older couple would have accrued, between them, during their lives.
I am sorry if you've taken anything I've said as mean. I haven't meant to be. I've just tried to explain why I wouldn't necessarily be drawn to a teen Mum (and it might be similar for others, even if they wouldn't necessarily articulate it in the same way). I would absolutely make initial assumptions that a teen Mum actively brought a child into the world in the knowledge that she couldn't give it so many things that I think are the starting point when deciding to become a parent.
I wouldn't treat you differently to someone else, if you approached me (I'd have a very good natter and, being honest, I'd be wanting to bottom out whether my assumptions were correct - and be very happy to find out I was wrong - just like, if she approached me, I'd want to know whether the gorgeous blonde in the Range Rover who constantly pushed dearest Tarquin to the front of everything really was as vacuous as she appeared!).
I say all this and I know people will equally make assumptions of me (which could fall anywhere on a rather damning line!). I'm fine with that. It's natural.