Of someone came in to buy a company, you'd base the value on the cashflows of the company discounted over several years (allowing for inflation etc). You then add a bit or remove a bit for goodwill, what someone is willing to pay over / under the value of the company.
Whilst the debt would possibly deter buyers it wouldn't effect the value of the club per se, only the profit/loss made could do that. This is mainly as the debt/assets are required to make the money the company is currently making, the assets are only helpful if it all goes wrong and you have to make money quickly.
So with the club aiming to be profitable you could argue it is being set up to be sold for more money even though I don't think this is case. I think RL just wants to stop losing money year on year on running costs, don't think he'd be as tight for players when he doesn't have to pump money into other areas of the club that the fans rightfully dont appreciate.