Anyone know some good ways to do that?
1) Get a ridiculously fast Internet connection. 25/25 Mbit works well.2) Get the oldest POS computer you can possibly find, that will actually turn on.
3) Install SME Server on it.
4) Make sure to take regular back-ups. Alternatively, if you have large amounts of disposable cash, get a fully redundant SAN with integrated backup functionality.
5) Since you're burning money, do all of the above, in another house so you have off-site backup.
6) Invest in an UPS and generator, so you aren't dependent on the municipal power supply.
Scale up or down as appropriate.