No. In 2009, they took out a second mortgage, not a reverse mortgage; the house had previously been paid off. At some point, that loan was acquired by Seterus, a lender/servicer that tends to buy the loans of the financially retarded. It is highly possible, but not confirmed, that Barb took out a reverse mortgage within the past couple of years, which lines up with a reduction in Chris e-begging.
(Additionally, Seterus was acquired by Mr. Cooper within the past few years, and the fact that, to my knowledge, Chris has never bitched about Mr. Cooper is a sign that the second mortgage may have been covered by Barb getting a reverse mortgage. Still, it is not confirmed.)
If Barb hadn't spent five figures on Rob Bell, then she would have spent five figures more than she has on useless garbage from Goodwill and sandwiches from Sheetz. She'd still have Discover/Capital One/LVNV/etc suing her for the same amounts, because she's a mentally ill, narcissistic redneck who can't handle money.
I'm pretty sure the funeral for Barb has already been prepaid; regardless, nice people from church or somewhere will probably help him get a small service. The mortgage and property taxes will be irrelevant, because Barb's creditors are going to take 14BC. Debt can't be inherited in the United States, so Barb's credit cards also aren't Chris' problem, aside from the fact that those creditors are also going to be coming for 14BC.