Yes.

You can buy an Odoo Enterprise (run faster because the price will increase in 45 days) and be prepared, contact a partner in your area.

FYI with really HIGH technical skill you can doit by yourself using openupgrade project, but in my experience the migration service on OpenERP is really good.

Yes. The Website Builder will be released with the version 8 of OpenERP(or now Odoo). I would suggest you to wait until june. Then the version 8 will be released and you can upgrade by yourself or make a Enterprise contract for Odoo(the Company) upgrade for you.

maybe you can get a SaaS-Version running in a virtualmachine to experiement and get some technical skills.

If you feel comfortable with vagrant (easy to learn, 1 hour), I could recommend: https://index.docker.io/u/flox/ubuntu-openerp/

www.vagrantup.com

I couldn't get it to run on the lightweight boo2docker image. So I included the docker container as provisioning on a regular ubuntu (14.04, because docker needs updated kernel version). You can draw on this vagrantfile, if you like, without garantuee..  Maybe you would have to search a vagrant box for your processor (this is a amd64 box)

https://github.com/odoo-colombia/Odoo-VagrantUp/blob/master/vagrant-docker/Vagrantfile