First point I'd like to make is Trotec is an Austrian company, not a US company. So if you want to support a US company, Trotec shouldn't be on the list. They are essentially no different than Rabbit in Ohio. US company selling foreign goods.
I'm not going to once again discuss the Chinese vs Western machines. It's been discussed a lot. It doesn't need to be discussed any further really.
The reality is, a 30W laser is not enough power if you want to work with wood. I did a bamboo cutting board the other day on my 30w. Run time was ~20 minutes. This was a graphic about 10-12" and 6-8" high. I probably could have tweaked the settings a little bit and maybe lowered the DPI a bit (I ran at 600dpi to get a bit more contrast). So if I did cutting boards all day long for 8 hours, I could get 24 done per day. Assuming $30 to engrave them, that's $720 a day or $90/hr. With 50W and assumption of running time dropping to let's say 15 minutes, you can do 32 boards in the same 8 hour day. Charging the same $30 per board, you're looking at $960 a day or $120/hr. Of course this is an assumption of having an endless supply of orders. If you only have 10 cutting boards to do all day, machine efficiency becomes less important to some degree.
If I were in your position, I'd first wait a few weeks until the ARA show in Vegas. That's the time to buy. Get show pricing. I'm pretty sure the Trotec Speedy 100 w/ a 50W tube is what they are pushing when it comes to the Speedy 100. You'll "save" a few grand doing that.
Equipment: IS400, IS6000, VLS 6.60, LS100, HP4550, Ricoh GX e3300n, Hotronix STX20
Software: Adobe Suite & Gravostyle 5
Business: Trophy, Awards and Engraving