I would suggest there are at least three SEPARATE issues:
Concern over the maintenance of the Ford V-10. Would appreciate more insight on this concern.
Engine that would power a "close to 40' motorhome"-- yes, you have defined DIESEL.
Limitations of a 40' DP: Very few in terms of roads. And with the exception of some of the older, particularly government CG's not really an issue. If these older CGs is important, or you have really back roads that you desire to travel, let us know the "wheres you want to go" so we can give specific advice.
