Can a diamond supporter Blow TNT up on my res if I give permission? I want to know this so I can do a project of mine.
You can't because your residence needs the "TNT" flag turned into a positive sign and plus you don't have permission to turn this flag on or off.
Quite correct, only a lot owner who is a diamond supporter can set the tnt perm to true. This prevents severe griefing with tnt by a diamond supporter on anothers lot if they only had build perms. Unfortunately it also prevents supporters from being able to help others by clearing out dirt.
If you have 60k you can ask your entire server to help you dig You can pay them 1k each for digging. XD
Cheaper then spending $100US in a donation to receive the 60,000r to pay the server population to dig it out for you.
We dug out a whole residence at SMP7 and we paid 150R per hour, at some point in the beginning we had about 30 people digging for us We did supply the diamond shovels tho. The whole residence was cleared from dirt in 2 days.