In New York law, losers in civil cases need to post the judgement against them before they can appeal. It will be interesting to see if he can convince the judge to lower it or postpone it as his lawyers claim he's facing "insurmountable difficulties" in obtaining a bond.
I imagine this is more of a liquidity thing than a wealth thing but he might be forced to sell something in a hurry.
In any case, I'm not sure how it would affect the presidential race.