@dhatz:
The Open ERP server may eventually have to be carefully public facing if I need to review data from home once the business is running, but I might be able to do this with VPN.
Always go the VPN route.
So far I am able to access the internet from LAN, and Wifi. I can print to all of my printers from LAN, but not wifi yet. I've been hitting my head against the wall with the captive portal setup, but I haven't spent much time trying to get it to work yet.
For your Wifi needs, use an external Wireless Access Point that will allow you to setup two WLANs / SSIDs (one for your own use and the second one for customers/CP) and pass them two separate VLANs. Unless you're doing this for educational reasons, you might consider avoiding the setup of a CP, and just change the password on the customers' WLAN once every few weeks.
I will go the VPN route, thanks for confirming that's the best way.
The Wireless access point is http://www.versatek.com/products-and-solutions/wireless/indoor-access-points/vx-ap400pro-high-power-400mw-wireless-ap.html
So I guess I should source a cheap managed switch from Ebay and figure out how to use it after all. Major problem is that finding a reasonably priced wall wart for that access point is proving to be a challenge, and POE injectors I can't seem to find anything but very expensive ones that say they are fully 802.3af compliant. All the cheap ones I can find don't seem to list their specifications. And of course my POE switch isn't managed, so I don't think I can run multiple vlans through that for the access point.
I'm almost hell bent on using the captive portal to limit bandwidth usage, terms of service agreement, hard time limit, device logging, and so on so they would have to reconnect, etc. just to help prevent abuse and help limit my liability if someone managed to do something nasty over my network. It will also be instructional for me, in case further business ventures require that knowledge such as a net-caffe or something like that.
Sorry I'm all on about "cheap" but right now my financial situation calls for that, because business funding is not available at the moment.
(Edit: I probably should have checked Versatek's site before saying that about the POE injectors. They have one that will work for my needs at a very reasonable price)