If you are only going to need it for one project, then you are better off renting if you cannot borrow. However, if you are going to need it several times in the future, buying could potentially sense. The size of the job that you are doing will be the main factor in choosing a sod cutter.
What is the fastest way to remove sod?
https://www.youtube.com/watch?v=28HOmM7VeWw
Is it better to use a sod cutter or tiller?
The biggest difference between sod cutters and tillers is what they do with the grass. While sod cutters create easily removed strips, tillers rip the turf and churn it into the soil. ... Cutting sod into strips also gives you the option to quickly replant the grass in another location or add it to a compost pile.