Adopting a teenager- are we crazy?

So, hubs and I have always planned on adopting older children when it was time to start a family. We had thought we would start out with a sibling group of 3-4 kids that were atleast 4 years old, and probably 13 at the oldest. Now, we're rethinking this plan, and talking very seriously about starting out by adopting a teenage girl, raising her as an only child, and adopting a younger sibling group after she has left the house. We are planning to buy a house at the end of this year, and will most likely begin our classes and the homestudy process soon afterwards. I feel like we're going into this fairly prepared, though I know that nothing ever fully prepares you. The big issue is that were both young- I'm 25, he is 34. We're in CA, which allows for us to adopt children up to ten years younger. Before you write us off completely- let me explain. DH and I have volunteered with teens for our whole relationship (celebrating 5 years of marriage in June) We've worked with a lot of teens in the system- both foster and justice. We've dealt with pregnancy scares, expulsion hearings, reporting so many issues to CPS that we were on a first name basis, kids with rage issues, arrests, near deaths from alcohol poisoning, we've been through it all. We've been cursed at, yelled at, insulted, had things thrown at us, DH has been spit on, all of the "pleasant" things. (We've also been invited to weddings, graduations, and sporting events, been there for birth announcements, and all the good things too) DH was a manager for a level 10 boys teen facility for three years, dealing primarily with juvenile offenders (mostly drugs) and difficult to place foster kids. I spent a lot of time with him there and we have seen the ins and outs of ODD, ADHD, etc. on a daily basis. Currently, he works at a level 14 facility for SED children. We're not naive- we know these kids have issues. We're both experienced in sifting through the BS, and I can honestly say that out of all the teens we've worked with, there was only one who surprised us with being worse off than we expected. (though we never would have considered him as an adoptive placement due to hx of meth use. pot, we can work with. meth, too much) I also know that any teen we bring home will most likely never call me mom or my husband dad, and that a lot of teens in the system aren't looking for parents in the traditional sense. We're okay with that. The way we see it, we have the space, we have the resources, a lot of patience, and some semblance of experience. We understand boundaries, we're consistent in our application and enforcement of expectations, rules, and consequences. We're ready to have doors slammed, and to have some really rough times. We know that our daughter may not ever consider us her parents. But, we would love to be able to offer a safe home with unconditional love, and a place to transition to adulthood. We are blessed with a strong circle of family and friends, all of whom are willing to accept our children, adopted or not, just as if they were born to us. DH has two siblings that are of no legal or blood relation to him, I have one. We both come from "family is what you make of it" families that aren't limited to blood relationships. DH was adopted at 18 by his stepfather. We know that all of these people will be here for us when times are tough, and will cheer with us when times are good. So tell me, are we nuts? I know that we will stick out as sore thumbs at PTA meetings, and that the average person will assume my duaghter is my younger sister, cousin, etc. I just can't get past the feeling that it just feels right and natural to add to our family in this manner. Any experience or insight people can share? Resources? It seems like information on adopting teenagers is few and far between. Thanks in advance! I have already learned so much from my year+ lurking around here :)