Greetings from the Florida Panhandle
First off, welcome to the Forums. We're glad to have you with us.
As to your questions. I can not answer them all, but I'll answer a few.
The price sounds pretty good, especially with w Hensley included.
The convection can be traded out for a gas over. There is probably someone here on the Forums who would trade you.
Our Lucy (2005 25FB) came with a 15" television. We originally replaced it wit a 19", and more recently replaced the 19" with a 23" Vizio. Theses were very easily done.
A Ford F-250 PSD should handle to towing duties very well.
SuEllyn & Brian McCabe
WBCCI #3628 -- AIR #14872 -- TAC #FL-7
2015 FC 25' FB (Lucy) with HAHA
2005 Suburban 2500 Quadrasteer (Olivia) & 2011 Silverado 3500 (Fred) with Outfitter Truck Camper (Ethel)