If you have a single point out, just create a wifi network with a NAT on the main box. The WAP's allow remote access to the network, and thus access to the box (using MS RDP or a remote desktop server (terminal services) for multiple simultaneous users) and once in the user simply browses the net.
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You can gain access to your disk drives on the local computer during a Remote Desktop session. You can redirect the local disk drives, including the hard disk drives, CD-ROM disk drives, floppy disk drives, and mapped network disk drives so that you can transfer files between the local host and the remote computer in the same way that you copy
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Printer and File Sharing on Remote Desktop Connection. If you need to enable printer and file sharing on remote desktop connection, just enable the following simple options on remote desktop client before connecting to remote computer, after that the local drives will be mapped on remote computer, and you can access to shared file or printer. Map a network drive from remote desktop back to local Map a network drive from remote desktop back to local computer. You are already most likely familiar with the process to “redirect” drives from your host computer over to your remote desktop session. This is as simple as choosing your local resources in the settings of your RDP connect window. Cannot connect to computer on LAN with Remote Desktop Mar 16, 2017