Yeah more often then not i've calced my own profit because the paint seemed low :p if you have spare time just buy iron/coal at market value and wait 20-30minutes to get better profit/hr
not really sure if the private server business is the best to get into atm although it could be with soulsplit going down and ikov soon to follow suit, but the market for them just isnt there as much as it was prior to 07.
I would consider trying to run 10 accounts before making a judgment on the amount of ram needed since the numbers past 3 accounts aren't 100% accurate.
if your going for the longhaul of 60+ range i'd just recommend and take the 20 minutes to unlock caged ogres by doing biohazard. i find that i got better xp there.
i mean most premium vpn's connect you continuously to the same server should you select it although I also recommend changing mac addresses because sometimes companies can see your banned based on mac address as well as ip.