Without wishing to be bleak, I don't think you've got enough land to do all on your wish list.
To aim at 2 breeding sheep on half an acre is being somewhat optimistic. Perfectly possible in a perfect year, but that rarely happens
. In a wet year it will get puddled up and the grass poached, And you've nowhere spare to put the sheep while the grass grows again. In a hot dry year you will run out of grass.
Your neighbour may have grazed 8 at a time, but it will only have been for a short time till the grass was eaten and then he will have had somewhere else to move them to. You don't have that option.
I would think your best option would be, as Sally suggested, to get some cade lambs. The fact that you're working doesn't have to be a problem - feed them before you go and again when you get back. Shut them up in a shed while they're small if you're worried about foxes.
If this still seems too much trouble then get some older weaned lambs that someone else has raised.
I would forget about producing your own wool. Getting just 2 sheep shorn can be difficult and expensive. There's plenty of people on here that can let you have a fleece at reasonable price and you can try different breeds.
You may find, as you get established that someone will let you have some more land and then the possibilities could be endless.