Tires will wear out faster with tandems. The back axle has to "slide" to make turns which is what causes the tires to wear out much quicker. But it's usually a set every 2 years, so that's not a lot of money. Just make sure you buy radials and not those bi ply that come on them. The bi ply will wear out in under a year.
I would look at kaufman trailers.
They make great quality trailers especially for the money. Lots of options for a low price.