Welcome! Enjoy the forum. It holds a vast wealth of information.
Learning to put your own lasers together is a very rewarding experience, and you can get more and more technical as you gain knowledge. I've learned to put my own units together, so now the next step is to learn to build my own driver circuits (even though it's far easier to build a hand held unit with a pre-built driver).
As for Sanwu, it's unfortunate that they are having issues. Someone showed me an email exchange with them, in which they mentioned that they "may never sell lasers again", so hopefully that doesn't end up being the case. They are in my opinion the best laser company for the casual (non-commercial/industrial) consumer.