Do you have the exact pricelist to back what you've said? Are
you very certain that Hispano is really very expensive?
Anyway, even if Hispano is expensive, it would be wise to invest
on it IMO. Take a look at the Habits, even without much maintenance
the bodywork is still reliable. Doors are working properly, even if
aircon is not working, its not oven hot like the ELBOs. The quality
is really there. Its all manufactured under european manfacturing
standards. They also conform with European crash safety standards,
particularly side impact and rollover tests.
Maintenance cost is very important in maintaining a vehicle. A
vehicle with high maintenance cost isn't worth investing on. Not to
mention its a danger to ride on for the commuters. 
Maybe SBST can consider to start investing in Hispano for the
first time and SMRT can continue doing what it did in the TIBS
days. Instead of some cheap Gemilang bodywork that have the
potential to be hard to mantain after years. Also, may I know
if ELBO bodywork is a European brand?