I want to start a hosting company
BAD idea. This is a market overrun by big companies and low profit margins.
softwares to be install on windows server 2008 r2 sp1 for shared hosting (opensource prefered)>
(having initial low budget)
Contact Mirosoft, Sign SPLA. Note: if you got a Windows with your server, hosting is not legal. Basically you run an illegal version then. SPLA is the only way to license softwareas service provider.
2) hyper v on xeon 5405 x 2 with 1 TB and 8gb Ram on same machine with shared hosting? how many
vps can be run on this machine.
Depends. A few. A lot. What you consider a vps? I have vps from 1024mb (512 is way too low for a windwos vps) to 16gb (yes, ONE vps). Note virtualiaztion rights - you need to license the vps separately from the main server OR get a higher license under spla. 8gb ram is very low for a virtual server, and 1tb - assuming you talk of 1x1tb hard disc - is pretty much nonoperational. I run SMALL servers on 16gb RAM and 4 (!) discs on a good raid controller. Larger virtual servers have 64gb RAM and a larger array of discs. Disc IO is pretty much your main bottleneck, 1gb discs are SLOW.
3) hardening my server from attacks
Hire a pro. THis is where you loose. Not knowing what you do + being small + low budget does NOT make you competitive.
4) marketing strategies.
Wrong place. We also dont advice on the best recipe to make Caipirinhas. That said, simple: LOTS of money. You talk hosting. That basically means you BUY customers.