The landlord is happy to subsidise your current lifestyle to the tune of €400-600 a month. When you think of it like that, it can be compared to salary, SW benefits, etc, and it becomes a bit of a no-brainer to me. Even more so given your earning trajectory looks positive in 2-3 years time. Even then I’d stay in the rental as long as I could (maybe build up directors pension a small bit while you can stay put in house). At some point, your landlord will retire and they’ll have a decision to make, move home or stay where they currently are. If they stay, you’ll be in prime position to buy the house you’re in. Landlord seems like a sentimental type that values the care you show for their house and would probably see selling it to you as “going to a good home”, so to speak. That would be my happy-path plan if I was in your shoes, and I’d adjust from there based on how circumstances unfold.
Oh, but RevPoints - stop messing around with those, and get yourself a high yielding deposit account that protects the value of your cash asap. You’ve got about 30% of the value of this house in cash, you don’t want that falling away to 25, 20, 15% over the years.