Easiest way to build a VPN Server for up to 50 concurrent clients

I have a local database ruing on a tower server with windows server 2012 for an organization, now I'm plaing to make it run online for remote access, but I don't like to use public IP or host name for remote accessing I want to create a VPN server that will enable my clients to coect to my database only when they coect to my VPN server My question is that what's the easiest way to do that, I heard about cisco asa 5505 and buying concurrent user license for cisco anycoect, also heard about some vpn routers like netgear fvg318 Please give me a details about this thing also the prices should not exceed $2000 Thanks