Zebra - we tried to do everything at minimal expense last year and really struggled, things like using shears to keep the paths cut, putting up with the clay soil, but it made it very hard work for poor rewards, so we decided we need to invest a bit more money and make our lives easier with the plot.
Agoodbook - we're in the South, so by mid April there shouldn't be too much frost risk so I'll get my spuds in then. One of my friends swears by dropping one slug pellet in the hole under each potato to keep the blighters at bay, I've got nematodes in the fridge which frustratingly I can't uses as I hadn't realised they don't turn the taps on at the site till Easter, very annoying. Think I will drench the garden with them instead, we have a lot of shade and a lot of hiding places for slugs, so we do get a lot of them at home.
Pirates - yes, a bed at a time is a good way to go.
Chippychop - depends what you want to grow in them really, I have two small raised beds at home, one about 8' deep, one about 20", I have had plenty of good crops in the 8" one over the years, especially things that stay fairly near the surface such as onions, lettuce, radishes, herbs.
Spent a nice hour up there today planting onions in the sunshine and had a chat with another plotholder about her miniature fruit trees, got a good tip for where to buy them locally, I'd like some apples. Also planted out sweet peas in the garden.