@Dave Byrne
It looks as though there is no certainty of contract available to an Irish landlord because:
a) the way the Act as written means the agreed rent is essentially just a placeholder suggestion until the RTB determine it counts as "market rent"
b) as
@stormy has demonstrated that the RTB appears to make and enforce arbitrary and capricious decisions to the detriment of the landlord
The logical market response would be for landlords to 'self-insure' against the additional risk of that environment by setting, and only being willing to agree to, a significantly higher rent which would compensate for the additional risk being taken.
Note that the Tenancies Act enacted in March requires the market rent to 'have regard to' the terms of the contract. A new contract not only transfers property rights l(ike the right to vacant possession for a sale) away from the owner, but the reality of all its terms must be viewed and valued in the context of the likely behaviour of the RTB.
Your answer then is to only agree to create a lease at a rent level which adequately compensates you for what you view as "landmines".
Unfortunately the RTB is also in control of what rent you and your prospective tenant are allowed to agree to - and you circle back to the fact that any rent you agree on is just an aspirational placeholder until RTB Enforcement gets round to considering it.
Without drifting into the realm of financial advice, it would not be surprising if a competent financial adviser suggested you find an alternative investment.