"sling my hook" never heard that one before
Well Rob is a pretty decent player, very polite and all, so i can't imagine him asking you to leave unless you build right against his wall.
However, if you are not happy with being close to other players then i'd suggest going for a wander through the region post. Using /randomregion can help you find new places faster than just running around from where you are now.
If this still doesn't help you, I'd be happy to help you find an empty area. I know of a few so whatever biome you want i'm sure i know of one.
However if you are comfortable where you are, you should stay. We don't allow tnt above ground or inside claims, so it would need to me removed block by block and it is best when people don't leave half built or empty houses around because it would upset other players in future. (so think carefully before deciding if you wanna move or not~)
In regards to you continuing your build, a quick talk with Rob will have it sorted in no time! I'm glad you're discussing things with him before you continue, it really shows your respect for others. ^_^
*Goldy stamp of approval* I like you, you're nice. Keep it up and shout if you need help~