They would have to have a discount much lower than 30% to homeowner, and a way steeper discount to the firm buying the remaining bundle of people who didn’t take the offer.
People with decent credit will simply get a new loan for 70% of their principal; kind of like refinancing.
That means rather than having to buy both the good and bad loans in bulk, firms can cherry pick the loans they want to buy.
Any loans left after that cherry picking will have already been turned down by the potential buying firms. They're effectively un-sellable, because everyone has already turned down buying them by refusing to issue a new loan in it's place.
That's exactly the point. There is nothing prohibiting them from doing that but they don't do it anyway because it makes life a little more difficult for them while making like substantially more difficult for the debt holder. Parent post is suggesting enforcing an inversion of that dynamic - put more power in the hands of the debt holder and less in the hands of the debt owner. A law is absolutely required to overcome the natural incentives at play, if that is the goal.
Your proposed law wouldn't even make life easier for anyone but the richest debtors, who don't need a law to protect them. The vast majority of people live paycheck to paycheck and have de minims savings. If you offered them a 30% discount to pay off their mortgage (or even a 50% discount), they have no way to come up with that payment without going out and obtaining another loan.
B) It's not really necessary to consider how the lender will fund the infrastructure necessary to comply with the law. That's sort of how laws work. If you want to operate in that space, you have to obey the law or not operate in that space. Either they will stay in that business or they won't. What is necessary to consider is the secondary effects of that decision, which would likely be decreased access to credit for borrowers with marginal credit. Might be OK, might not.
C) RE: whether it's a viable business model, see above.
D) RE: benefiting richer debtors proportionally more than poorer ones, that's relatively easy to handle - we have all kinds of policies that are targeted to benefit one economic class over another. Most of them are tuned to help the richest, but there are plenty tuned to help the poorest or the middlest. It's not a problem so long as we build in the correct dials to tune those parameters.
E) RE: unavailability of credit to low-income debtors to take advantage of this scheme - I have no doubt that new enterprises would form to take advantage of this economic niche. It might be higher risk, and come with a somewhat higher rate, but it might be viable to make a marginally risky $40,000 loan where it would not be viable to make that same loan at $100,000, particularly if the loan was secured by the property. That is in effect already happening, it's just the bank buying the loan from another bank that gets the benefit.
This stance hits me as entitlement cloaked within anti-capitalism/pro-consumerism.
The argument you replied to isn't that the law should be changed to allow this to be offered to the debtor.
The argument is that the law should be changed such that this is required to be offered to the debtor, prior to offering an external sale.
Ofc, the original buyer could offer instead offer to refinance.
This whole thing reeks of entitlement to me. If you take out a loan expect to pay it off. Don't expect that if the lender goes belly up that means you got some get out of jail free card.
The current system, to me, has just as much entitlement, just from the other side. Why should it be some unrelated party that benefits from the lender's misfortunes. The lending is between two parties, and it seems reasonable to keep it that way unless both parties agree not to.
If you first skim off the "best" loans, the ones held by debtors in a position to pay them off at a reduced rate you know have a higher risk/lower value bundle.
So what do you do with the new remaining bundle of loans? Offer those debtors the ability to pay them off at even greater reduced rates?
Eventually you iterate down to the highest risk lowest value bucket that almost nobody would see the value in purchasing.
The remaining business is doomed to fail now but even more painfully.
It lowers the debt total of the borrower, and makes the assets held by the new lender less toxic.
Seriously, stop making up fake numbers and look up price quotes on real mortgage-backed securities. The real world doesn't work anything like what you're describing.