He won't have to take a loan out at all - that's total bullshit.
It's also bullshit that you wouldn't be paid anything at all until he takes out his pension.
You MUST get legal advice here, because you need the formal notification that you are entitled to x% of his pension. Without this, his pension company won't be able to do anything.
I was awarded x% of my exH's pension as part of our divorce settlement. NOTE: make sure the agreement is in terms of %, rather than a fixed sum.
Exh ignored all correspondence from his pension company for 5 years. He totally refused to abide by the divorce settlement ruling or to facilitate it. It took me 3+ years to progress this on my own, but I did, and I succeeded because it was a legal ruling and the company was obliged to deal with it.
Because the agreement was for a % of his pension, when it was finally all sorted (still without his participation) I got £20k more than I would have done if he'd sorted it straight away. So he lost out big time (ha ha!). Serves him fucking well right.
DO NOT settle for anything else OP. A part of his pension is going to be worth far more to you than anything else. Do not let him persuade you that the house is worthless therefore you won't get anything. He is trying it on.