I Need Help!

Anyone who is or has built a tiny house on a trailer… I am considering building my house to be 9’-0”, this is obviously over the road-sized 8’-6”.  With how much I am actually going to be moving this though I am thinking it may be worth the $28 dollar over-sized load permit and the time taken to acquire the permit.  Has anyone else considered this and or run into any big issues with it?