My state only allows a certain amount of security deposit, and my lease does state that it cannot be used as the last month's rent without my permission.

If the deal is truly good, you should have no problem finding a buyer...Some thoughts:- List it on the MLS (if legal in your area and you have permission from the seller)- Craigslist- Local REIA mailing list- Here on BP- Call cash buyers/landlords in your area- Bandit signs

I know the land has to be surveyed, a road will have to be put in (unless we can get permission to use a driveway already in place).

He came home one day and found an eviction notice on his door His crimes;- no permit to build a tiny house on someone else's land with their permission - not connected to grid - no fees for bureaucrat to pocket- not paying property tax - despite being a renter they want to take money from him somehow The real issue here is this person found a way for himself to live off grid without supporting the fee collectors.

I see myself as an interested party that has reason to see it and don't understand why I need to the seller's (borrower's) permission.

You did not ask permission, nor did you notify us that you were moving I additional family members.

My tenant signed a lease stating only 2 will reside in the 2BD/1BA unit and Guests are allowed for only 5 days per month unless they have written permission from the landlord.

Most utility companies have a "landlord policy" where you would be notified if they stopped paying, and the bill get sent to you when they take the account out of their names when they are moving.I allow them to pay separately, and most use Intuit's Payment Network- $.50/ transaction.Put whatever rules you want in the lease, mine includes clauses about medical marijuana, bed bugs, when to take the trash out, that Drano is ok to use, not to use flushable wipes, that light bulbs within the unit are their responsibility, not to turn the heat down below 50 degrees, not to change locks, no guests for more than 5 days without written permission, the list goes on.  

If you have an easement then your right is superior to the rights of the owner and you can enter and dig without permission. 

They have also been hostile and difficult over the last 2 months with several different small lease violations I have looked past (installing washing machine without permission -we were supposed too and then it leaked and we had to come fix it, holes in walls to hang things, temporarily housing a pet "for a friend" without permission (no pets allowed), paying late...).