Why will the debtor not pay you? Is it because they do not have the money? If that is the case, then, frankly, there is no point in issuing the proceedings.
Are they likely to survive in business and be damaged by a judgment? If yes, then you have a good chance of recovering your money and a sizeable proportion of your costs.
If the debt is unarguable, they may not defend and you may get an undefended judgment. If they don't defend , you have to ask again, is it because they don't have the funds?
If they are going to defend the proceedings and go through a Court hearing then 10K is pretty much the actual cost of legal representation.
mf