Very late to the party here, so you may be committed one way or the other. My wife and I chose to foster rather than have kids (at least for now) and there is often the opportunity to adopt from the foster system. Of course, the goal is to reunite the families, but sometimes that is just not possible. From a SJW standpoint, the foster system is severely taxed and really needs good people (Mustachians!!) in it. Adopting takes a lot of time and money for many reasons, but maybe because there is a lot more demand than supply?
If you foster, you're paid by the state, a subsequent adoption would be nearly free, and you're performing a greatly needed service. In fact, there's a lot of low-income families that foster as a kind of business model to get by on just the stipend, or people who have a small income coming from disability or SS that supplement their income with a few foster kids. Some of these situations are great, others not so much, but it can be a very cheap, even profitable way to have kids. Once you adopt out of the system, or the child ages out, most states have some really great benefits for them to get them on their feet. Just some thoughts to consider for anyone else who stumbles on this thread.