You are the one that ultimately has to answer this question. We will help
you by providing the Pros and Cons of having a motorhome or tow vehicle powered
by a diesel engine.
PROS
R
Diesel engines are more fuel efficient than gas engines, you
can expect more miles per gallon (don't expect a dramatic difference).
R Diesel engines if properly maintained, have a longer
life-span than gas engines. It is not unheard of for diesel engines to
go well over 200,000 miles before requiring a rebuild or overhaul.
R A diesel engine provides more torque at lower RPMs (in
laymen's terms it will get up a hill faster than a gas powered vehicle).
R Diesel Motorhomes have a wider selection of floor
plans available. They traditionally have more luxurious interiors than
gas powered Motor Homes.
R The chassis of most diesel Motor Homes are beefier than the
chassis of gas motor homes. So the carrying and towing capacity is
greater (this is why a lot of Fulltimers prefer diesel over gas).
R Altitude does not greatly affect the power of a diesel
engine (you will have better acceleration in the mountains).
R Diesel powered Motor Homes tend to have a smoother ride than
gas powered motor homes. This is due to the availability of air ride
suspensions and the heavier chassis.
R Diesel powered Motor Homes and tow vehicles retain their
value better than gas vehicles (better MPG and longer life-span contribute
to this price retention).
R Diesel engines produce less CO2 emissions (CO2 is considered
to be the catalyst to global warming).

CONS
R Diesel powered Motorhomes and tow vehicles initially cost
more than gas powered vehicles.
R The maintenance cost for diesel engines is higher than on
gas engines (service costs more, parts cost more).
R
Unless you are comfortable working on diesel engines, there
is not a lot of do it yourself maintenance that you can perform (you might
be able to replace the air filter).
R Currently the cost of diesel fuel is higher than gas (this
might be offset by the better MPG of the diesel engine).
Hopefully, the above information will be helpful in steering you
in the right direction. If you have decided that a diesel engine is the right
type of engine for you, you should now head over to the Buying a RV section of
this web site to get some more helpful hints. One thing is for sure you will
never regret becoming an RVer regardless of the type of engine you choose.