Reseller hosting is absolutely the best solution there is to host more than one website. If you purchased via my link and need any help with using your account, just send me an e-mail and I'll help you out.
I am not promoting this just for the sake of promoting a hosting company. The very few support tickets that I ever sent have been responded within minutes and they really know what they are doing.
If you are really creating an online business you want to have reliable backups of all your content, websites and plans. If you don't then you are at the risk of servers being hacked and cleared and you will lose months, years of work.
Your computer hardrive is not the best place to do backups since that is also quite vulnerable.
If you want to have secure backups then I would have to suggest sugarsync to you. They have a free 2GB plan that you can use to get started with and to be honest if you don't want to backup your collection of photos, it should be enough.
If you use that link you will get 250Mb extra space - so will I - and if you buy their paid plan (30GB or more $50/year) you will get an extra 5GB and so will I.
If you want to learn how to make wordpress theme customizations then check out Costa's Blog - it is the best resource for good advice in this category.
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